The Horse chestnut is easily recognized, with distinctive palmate leaves and an autumnal crop of conkers.  It was introduced from Turkey around the 1600s, and is a common tree in parklands and towns, but occurs less often in woodland.

Identification: Tree shape

The tree grows up to 40m tall and has a wide, domed canopy with foliage coming low down the tree.  Trees live up to 300 years.  It grows fast in most soils, and needs plenty of space.

Identification: Leaves

Horse chestnut leaves are palmate, consisting of 5 – 7 sharp-tipped leaflets arranged like the fingers of an outstretched hand.  Each leaflet can be 30cm long, making for impressively large leaves.

The leaf margins are toothed, and each leaflet has clear alternate lateral veins.  They’re a rich green colour.  For more on leaf margins click here.  For a blog on compound vs simple leaves click this link, and tips on leaf shape can be found here.

Identification: Flowers

The flowers of the Horse chestnut grow in a clustered tower of up to 50 flowers, known as a panicle.  These are sometimes referred to as candles.  Branches of the panicle are longer at the base than the top, creating a cone shape.  The uppermost flowers are male, those in the middle are both sexes, and the lowest ones are all female.

 They have a distinctive shape with bilateral symmetry.  Each flower is 9-11mmm long and has 5 fringed white petals, with a yellow patch at the base.  Once pollinated, this turns from yellow to dark pink.  This may communicate to visiting insects that the flower is no longer worth visiting as it has ceased providing nectar post fertilization.

Identification: Fruit

Horse chestnut seeds are known as conkers.  Only 5 or so flowers per panicle develop into conkers.

The conker is instantly recognizable.  Encased in a pale yellow-green, spiked case; conkers are a shiny mahogany brown.  This type of seed is known as a capsule by botanists.  (For more on seed types, check out my blog.)

There are 1-3 conkers per fruit, released when the seed case splits three ways at maturity.  Each is up to 4cm across, with the entire fruit measuring up to 7cm

Identification: Bark and buds

The bark is pinkish-grey and thin in young trees, becoming grey-brown and scaly with age.

Buds are distinctive and grow on stout hairless twigs.  They are a rich reddish brown, oval, and very sticky.  Lateral buds are opposite.

When the leaves shed, they leave a distinctive horseshoe-shaped scar.  This could be the source of the tree’s name; although some suggest it relates to the curative flour, made from ground up conkers, that used to be fed to horses.

Similar species

The Indian Horse chestnut, Aesculus indica, native to the Himalayas, is the only similar species.  Like the Horse chestnut, it is planted in parks and public spaces.

However, it follows in June rather than April to May and is a less robust tree.  Indian Horse chestnut conkers are small, dark brown and wrinkled, and held in smooth green seed cases.

History: Folklore

Because the tree was introduced to the UK comparatively recently, there’s not a great deal of folk lore associated with it.

However, the conkers are threaded onto strings and used to play – wait for it – conkers.  The first recorded game occurred in 1848 on the Isle of Wight, although there’s evidence the game was played with other less suitable nuts prior to this.

 To play, you take it in turns to whack your opponent’s conker with your own, the aim being to smash your opponent’s conker to bits.  Baking, pickling in vinegar, and drying for a year or more are all methods thought to toughen up a prize conker.  To this day, kids in the UK play conkers every year (although some well-meaning schools have banned the practice because it’s deemed dangerous).

One foot note is that some think keeping conkers in a room discourages spiders.  My studio has an open box of conkers and a plethora of friendly spiders, so I remain unconvinced.

History: Mankind and Horse chestnut wood

The wood of the Horse chestnut is pale and light.  It is weak and is mainly used to make children’s toys and for carving.  As it’s absorbent, it is also used to make trays for storing fruit, and it was sometimes used to make light weight artificial limbs.

History: Food and Medicine

Conkers were ground up into flour in Victorian times, and used as a coffee substitute during World War 2.  The mildly poisonous nature of the fruit, and its limited appeal has made this practice obsolete.

Flower buds can be used as a substitute for hops in beer brewing

Medicinally, conkers were fed to cattle and horses by Turkish soldiers in the 1600s to cure respiratory disorders.

Varicose veins, haemorrhoids, sprains and bruising can all be treated with Horse chestnut creams which thin the blood.  This makes it harder for blood to leak from veins and capillaries, and is useful in the treatment of water retention and oedema.  Aescin seems to be the active compound at work here, both for animal and human ailments.

Finally, the high levels of saponin made them good for making soap, after crushing and soaking the conkers in boiling water.  They are considered useful as moth deterrents by some.

Horse chestnut and Wildlife

The profusion of flowers provide a welcome treat to pollinating bees in late spring, and the caterpillars of the Triangle moth Trigonodes hyppasia feed on the leaves.

The larva of the Horse chestnut leaf mining moth Cameraria ohridella also feed on the leaves, the caterpillars are part of the diet of birds like the Bluetit.

Threats

Two pests and diseases have taken a firm hold of the Horse chestnut population recently.

The first is the Horse chestnut leaf miner mentioned above.  This insect burrows through the leaves, eating as it goes.  It can make entire trees look ill with blotched, yellowing leaves.  The good news is that there’s little evidence that the caterpillars do any lasting damage, merely altering the appearance of the tree.

The second is Horse chestnut bleeding canker, a more serious threat.  This bacterial infection damages the wood and bark, blocking the tubes of the phloem, making it impossible for the tree to carry water and nutrients.  This eventually kills the tree.

Signs of the canker include oozing dark patches on the trunk, discolouration of the wood, and chunks of bark peeling away.  This canker is becoming more common since it was first noted in the 1970s, and now infects more than 30% of English Horse chestnuts.

Trees also suffer leaf blotching caused by the Guignardia fungus, and are prone to scale insect infestations.

Conclusion

With their beautiful candles of flowers and ornamental stature, Horse chestnuts are handsome trees.  Although of limited practical or culinary use, they are vital to parkland and gardens.  One can but hope that the threats posed by canker and pests don’t end up reducing the population of these trees too seriously.

Online sources for this blog include websites of the Woodland trust, Trees for life, Totally wild, the Tree guide UK, and NatureSpot.  Reference books for this blog include the excellent The Greenwood Trees by Christina Hart-Davies  , and the Reader’s Digest The Field Guide to the Trees and Shrubs of Britain (out of print but commonly available second-hand).  I also referred to The Tree Forager by Adele Nozedar and The Living Wisdom of Trees by Fred Hageneder.

The post Trees: Horse chestnut Aesculus hippocastanum appeared first on Lizzie Harper.

Scots pine is one of a series of blogs I’m writing on common British trees.  You can also see blogs on the Elder, the Yew, the Ash, the Oak, the Holly, the Sycamore, the Rowan, the Hawthorn, the Birch, the Lime, and the Beech.

The Scots pine is one of only three native UK conifers, along with the Yew and the Juniper.  It grows wild in heathland and in the Caledonian pine forests of the Scottish Highlands, although only 1% of these remain.  About 7000 years ago it was the commonest tree in Britain but suffered when the climate got wetter and warmer and then again when it was cleared for grazing.  Instantly recognizable, it is used for timber and provides a haven for birds, insects, and mammals.

Scots pine Pinus sylvestris tree

Identification: Tree shape

Scots pine grow to 35m tall and have a domed or flattened top and can live for 700 years.  They shed their lower branches as they grow, leaving distinctive broken limbs below the main crown.

Scots pine Pinus sylvestris tree growth progression

These trees grow in poor soils from sea level to 2,400m and were briefly extinct south of Scotland in the 1600s before being re-introduced to parkland and heaths.

Identification: Leaves

Scots pine have slightly twisted paired needles.  These are a grey green and grow to 10cm in young trees.  As the tree ages, the needles grow to shorter lengths, in the region of 3 to 7cm long.  They are evergreen, and linear.

Sprig of Scots pine

Identification: Flowers

The flowers of Scots pine are monoecious, meaning male and females are borne on the same tree.  The female flowers grow on higher more exposed branches where they can catch the male pollen, carried by wind.  They are reddish purple and grow on the tips on new shoots, looking like tiny pine cones.

Scots pine female flower (strobilus)

The male flowers are clusters of yellow pollen-producing anthers, growing at the base of the shoot.

Scots pine male flowers

Scots pine tend to flower in May, filling the air with clouds of pollen.

Identification: Fruit

The fruit of the Scots pine is a cone.  These develop from the fertilized female flowers and start off as green.  The cones take two years to mature and are 3 to 6cm long.  A Scots pine will bear cones of different ages simultaneously – young green ones and larger older grey ones.  Mature woody cones have a raised bump at the centre of each cone scale.  Within the cones are the seeds, and once mature the cone scales open to release the winged seeds.

Mature cone

Identification: Bark and buds

The bark of the Scots pine is reddish but becomes fissured and darkens to near black with age.  This explains why the tree looks like its tree trunk is two coloured, rusty red at the top and black at ground level.

Twigs are hairless and green, and the plant has sticky buds borne on the tips of yellowish twigs.

Similar species

There are other pines grown in Britain, many in forestry plantations rather than in the Caledonian forests or on heathland.  The bi colour of the bark makes the Scots pine distinctive.  The other native evergreens, the Yew and juniper, are very different from the Scots pine.  The former has glossy dark green needles and a flaky brown bark and the juniper has needle-like leaves and grows low to the ground.  They bear soft red and dark purple berries respectively, rather than woody cones.

Juniper Juniperus communis

History: Folklore

The Scots pine has been voted the national tree of Scotland and figures on coats of arms and clan motifs.  Clan chiefs would be buried under Scots pine trees and in the Norse countries, great warriors were buried on land in boats made from pine wood.

History: Mankind and Scots Pine wood

Scots pine were planted near isolated farms in the north as wind breaks, and stands of them were planted to help travellers with navigation on bleak moors and heaths.

The wood is a strong softwood and is used in the construction industry, and to make telegraph poles, gates, fenceposts and pit props in mines.  It has also been a source of charcoal.

Jackdaw on ancient Scots pine fence post

Rope can be made from the inner bark, tar derived from the roots, and a dye from the pine cones.  The cones were also dried and used for kindling.  Finally, turpentine can be made by tapping the tree for resin.

History: Food and Medicine

Although pine needles are edible, they are pretty tough and better used for flavouring.  Some evidence suggests that they can induce miscarriage, so shouldn’t be eaten by pregnant women.  They can flavour sugar, syrups and alcohol.  Steaming vegetables over water full of pine needles can give a piquant flavour, and they can be made into teas.

Cones and needles

Scots pine needles are rich in vitamin C and can be nibbled to quench thirst, or drunk in teas to fight asthma and fatigue.

There are unsubstantiated claims that pine pollen helps prevent aging.  Liniments of pine are used on sore joints, diluted pine oil can banish head-lice, and pine tar can help treat skin problems.  The scent of pine helps clear blocked noses and is good for respiratory problems.

Scots pine and Wildlife

In the Caledonian forests, rare birds like the Capercaille live along with Scottish wildcats and plants like the Lesser twayblade.  The forest floor is home to ants including the Scottish wood ant.

Worker ant Formica aquilonia Scottish wood ant

Red squirrels chase each other around their trunks and Pine martens chase the red squirrels.

Pine marten Martes martes

Flocks of Crossbill and small passerines feed there.  Golden eagles and Osprey nest in the crowns of the trees.  They provide vital shelter for so much wildlife, as seen in this blog from Loch of the Lowes.

Threats

Various diseases like Heterobasidion annosum affect the Scots pine causing root rot and butt rot. Pine stem rust, red-band needle blight, and needle cast disease also occur.  The trees suffer attacks from the pine wood nematode which causes pine wilt and Fusarium circinaum, a disease that leads to tree canker.  Some of these pathogens are recent arrivals and pose real threats to the trees, although the University of Nebraska suggests pine wilt can be prevented by injecting healthy trees with abamectin or emamectin benzoate.   For more on the threats to Scots pine, check out the article in The Guardian newspaper.

Canker (in this case on a rose not on a Scots pine)

A potential threat in future years is the Pine processionary moth Thaumetopoea pityocampa whose range is expanding northward due to global warming.

They may also be defoliated by the Pine tree lappet moth Dendropinus pini.  Migrating north from the European mainland, a breeding colony was detected in Scotland in 2009 and containment regulations are in place to try and contain its spread (Scottish Forestry).

Conclusion

The Scots pine is an easy recognised native conifer.  Despite challenges facing the tree, mainly caused by invasive species moving northwards thanks to global warming, for now it is common on uplands, heathland, and in forestry.  Providing timber and protection for wildlife, it is to be hoped that it will continue to thrive for centuries to come.

Long-tailed, Blue, Coal and Great tit in a Scots pine

Online sources for this blog include websites of the Woodland trust, Kew Plants of the World , Trees for life,  Tree guide UK, and NatureSpot.  Reference books for this blog include the excellent The Greenwood Trees by Christina Hart-Davies and the Reader’s Digest The Field Guide to the Trees and Shrubs of Britain (out of print but commonly available second-hand).  I also referred to The Tree Forager by Adele Nozedar and The Living Wisdom of Trees by Fred Hageneder.

The post Trees: Scots pine Pinus sylvestris appeared first on Lizzie Harper.

This is one of a series of blogs I’m writing on common British trees.  You can also see blogs on the Elder, the Yew, the Ash, the Oak, the Holly, the Sycamore, the Rowan, the Hawthorn, the Birch and the Beech.

There are 10 species of Lime in the UK, with three growing commonly in the wild.  Along with the Small-leaved Lime Tilia cordata, the focus of this blog; there is the Common lime Tilia x europea and the Large-leaved (or Broad-leaved) lime Tilia platyphyllos.   Lime trees are often called Linden trees, a catch all for all Tilia  species.

It’s important to remember that these lime trees have nothing to do with the citrus family’s lime tree which bears the lime fruit, Citrus x Latifolia

Identification: Tree shape

The Small-leaved lime reaches up to 20m and has a pretty conventional shape.  They grow in ancient woodland, favouring moist nutrient-rich soils, although Large-leaved limes prefer lime-rich areas.

Lime Tilia cordata tree

Identification: Leaves

Leaves are 3-8cm long and shaped like a heart (as noted in the Latin name, cordata, which means heart-shaped).  They have sharp small teeth and a prominent tip.  Sometimes they are wider than their length.

Leaf of Small-leaved lime

Where the leaf stem or petiole attaches to the twig there are tufts of rust-red hairs.  These also appear on the underside of the leaf, at the junctions of the veins.

Identification: Flowers

The flowers smell delicious and are carried in clusters of five to ten blooms.  They have five petals, are a greenish yellow, and carry male and female reproductive structures.

Lime flower

Unlike other Lime trees, the flowers stick out from the leaf-like bract they’re attached to at all angles.  Other species have more pendulous blossoms.

Flowering cyme of the Small-leaved lime Tilia cordata

Identification: Fruit

Small-leaved lime fruit ripen in August and are small and round.  They have prominent tips.

Identification: Bark and buds

Small-leaved lime bark starts smooth but develops fissured plates with age.  The twigs are chestnut brown, and become glossy in the sunshine.  The underside of the twigs is often flushed olive green.

Bark of the Common lime Tilia x europea

Buds are up to 4mm long, have two scales. and are shiny red.

Similar species

The two other common UK Lime species are the Large-leaved and Common lime.  The Large-leaved lime has bigger leaves which grow to 13cm long and have more regular teeth.  Hairs cover the underside of each leaf.  Large-leaved lime carry flowers in clusters of three to a maximum of six, and the fruits are prominently ribbed.

Large-leaved lime Tilia platyphyllos

Common lime is a hybrid of the other two species so shows mixed characteristics.  It also has heart-shaped leaves which are larger than those of the Small-leaved lime.  The hair tufts on the underside of the leaves are white, not red.  When in bud, Common lime twigs zig-zag and bear a bud at each change of direction.

History: Folklore

In Eastern Europe, the Lime is a symbol of fertility and is considered sacred in Slavic culture.  It has links to the Germanic and Norse earth goddesses Frigga and Freyya.  Germanic cultures in ancient times used the tree as a symbol of justice, with trials taking place beneath its boughs. Tthe Swiss and French planted Lime trees to celebrate battles.  In Britain Lime trees were planted along roads to encourage prosperous harvests of grain.

Linden tree

The tree is also associated with love and romance.

History: Mankind and Linden wood

Lime wood does not warp if cured correctly so is used to make bowls, furniture, and piano keys.  It is soft and light and easy to work.  Grinling Gibbons (1648-1721) carved his ornate alter pieces and panels from lime wood as it cuts cleanly and easily, and traditional nesting Matroshka dolls were carved from Lime.

The inner layer of the bark is fibrous and was used by Europeans and First Nations’ peoples to make rope, fishing nets, and string until Hemp was introduced from China in 400BC.

History: Food and Medicine

The flowers of the Lime tree are dried and made into fragrant herbal teas whilst the sap can be made into wine.

Medicinally, the teas or tissanes made from Lime were used to treat “nervous disorders”.  These included headaches and insomnia.  The tea is said to soothe diarrhoea and sinusitis as well as being used to calm jangled nerves and reduce blood pressure and cholesterol. It was said that sitting under a Lime tree could mitigate epilepsy.

Small-leaved lime

Applied to the skin, it can soothe skin conditions.

Lime trees and Wildlife

The blossoms of the lime tree attract pollinators, and in America Lime tree species are sometimes called “bee trees”.  Linden blossom honey is delicious.  Along with the bees and butterflies, wasps, and hoverflies, the trees also attract vast numbers of aphids and their “farmers”, ants.  All lime trees tend to be coated in honeydew produced by the aphids which makes the leaves sticky and may cover the ground below the tree.  The aphids attract predators such as hoverflies and ladybirds.

Ladybird Coccinella septempuctata

Nail galls are common on the Small-leaved lime and look like tiny scarlet fingers growing from the leaf surface.  They are the product of the Eriophyes tiliae mite which feed inside them, and seem to do no damage to the tree.

Lime Tilia europaea leaf nail galls from mite Eriophyes tiliae

Moths such as the Lime hawkmoth, Peppered moth, Vapourer and Scarce hook-tip use the Lime as a food plant whilst birds and wood boring beetles exploit the dead wood of older trees to make their homes.

Threats

Ancient woodland is a rare habitat in the UK, although it used to cover much of the land.  In 3000BC the Small-leaved lime was the most common broad-leaved tree in the UK.  Ancient woodland is where most Small-leaved limes grow, so the threats to this habitat are mirrored in the threats to the trees.

Some fungal infections can cause cankers and root rot, and occasionally a Lime tree may die from Wilt.

Aphids and some mites weaken the tree, but there are no new fatal diseases wiping out all our Lime trees.

Conclusion

With the scented flowers and heart shaped leaves, Limes are easy to recognize.  They make safe homes for many insects and are a firm favourite with pollinators.  With strong pale wood and a plethora of uses in herbal medicine, the tree has been used by mankind for millennia.  And luckily, despite the loss of ancient broad-leaved woodland, the Lime or Linden looks set to remain an important tree of the British Isles for many years to come.

Small-leaved lime Tilia cordata

Online sources for this blog include websites of the Woodland trust, Kew Plants of the World, Tree guide UK, and Nature Spot. Reference books for this blog include the excellent The Greenwood Trees by Christina Hart-Davies, and the Reader’s Digest The Field Guide to the Trees and Shrubs of Britain (out of print but commonly available second-hand).  I also referred to The Tree Forager by Adele Nozedar and The Living Wisdom of Trees by Fred Hageneder.

The post Trees: Small-leaved lime or Linden appeared first on Lizzie Harper.

There are two main Birch trees in the UK, the Silver birch Betula pendula and the Downy birch Betula pubescens.  The Downy birch tends to grow better in wetter areas and in the north.  The Silver birch likes drier soils and is often found growing ornamentally in gardens and cities.

Both reach heights of 30m and can have a 20m spread.

They are pioneer species, easy to recognise, represent guardianship and fertility, and they are used to make everything from shoes to bobbins.  Birch also treats ailments as diverse as gout and skin disorders.

Birch trees support over 300 insect species, and birch woodland provides a wonderful habitat for woodland flowers.

This is one of a series of blogs I’m writing on common British trees.  You can also see blogs on the Elder, the Yew, the Ash, the Oak, the Holly, the Sycamore, the Rowan, the Beech, and the Hawthorn.

Identification: Tree shape

Birches have a slender shape, and twigs which can droop.

They are often the first to colonize a landscape which has been devastated by fire or deforestation.  When it comes to re-wilding, scrubby birch wood is often the first step.  This makes them pioneer species, settling the land and making it accessible to other plant species.

Birch is the commonest tree in Scotland, and the Downy birch stretches way up into the arctic.  For more on trees growing in such inhospitable climates, check out my blog on illustrating The Treeline by Ben Rawlence.

Identification: Leaves

Leaves are more or less triangles, with toothed margins.  Each leaf is up to 6cm long, and shiny green.  In autumn they turn to a bright, pale yellow.

Downy birch have less jagged margin teeth than the Silver birch, and the leaves are diamond-shaped, and less rounded.  However, the two birches frequently hybridize, hence me popping them into the same blog.

Identification: Flowers

The birch is monoecious, which means it carries male and female flowers on the same plant.   These are wind pollinated catkins.  Male catkins are yellowish, and grow through the winter maturing as the birch leaves grow in spring, then dropping.  These are long catkins, easily visible, and carried in groups of 3 or 4 at the tips of the shoots.

Catkins of the DownyBirch

Female catkins are smaller, and bright green.  They’re borne upright and flower in April through May,

Catkins of the Silver birch

Identification: Fruit

After pollination, the female catkin thickens and develops a dark crimson colour.  Masses of tiny seeds are released from this fruit, and borne off in the wind.

Fruiting catkins of the Downy birch

Identification: Bark

Silver birch bark is what gives the tree its name.  It’s paper white, and can be peeled from the tree in sheets.  There are often dark diamonds present, and older trees may have far darker trunks, especially towards the tree base.

The white colour reflects UV light, some suggest it works like a sunscreen in areas where reflected light from the snow can be blinding.

Buds are long, purplish and pointed.

Twigs are drooping and smooth, with dark warts.  The shoots of Silver and Downy birch can be used to tell them apart.  Silver birch shoots are smooth with warts, whereas those of Downy birch are rough, warty, and covered in short, downy hair.

Similar species

The white bark sets these trees apart from others, and the little triangular leaves with their jagged edges are unlike other large tree leaves.

Most sources suggest the main problem here is telling your Downy form your Silver birch, other species don’t get a mention!

History: Folklore

The Birch is seen as a guardian tree, and a way to keep evil spirits at bay.

Baby cradles would be made form birch to keep the devil away, and people would bring bundles of birch wood into their homes at Halloween to repel the evil spirits.  Birch brooms swept out dirt, but also got rid of the devil, and a garland of birch twigs might be hung over the door for protection.

However, witches broomsticks were also meant to be birch wood, so there’s some disconnect there.

Birch is also closely linked to fertility.  Using a switch of birch on a heifer would either ensure she got pregnant, or that the calf was healthy.

In Britain, if a couple wished to live together but not marry, they could step over a birch broomstick together.  Once done, they could live as man and wife.

When Beltaine came around on May 1st, with all its’ links to spring and fertility, it would be the Birch tree chosen as the wood for the maypole.  In some places, this festival meant any legal bonds between couples could be lifted for 24hrs, and there was frequently a spike in birth-rate at the start of the following February.  It will come as no surprise that these practices left the Christian church apoplectic, but powerless to do much about it.

Birch also relates to motherhood and femininity.  Russian folklore has the Birch as the “Lady of the Woods”, while there are close links between the Irish goddess Brigid and the Birch.  Brigid was the goddess of poetry, something of a muse, and responsible for spinning and weaving.

History: Mankind and Birch wood

Birch wood is pale and soft and not very durable.  It’s used for walking sticks and broom handles, and makes good charcoal.  It also makes good skateboards!  Bobbins and spinning reels were made of birch wood, back in the days of the Lancashire Cotton industry.

The bark has been used to make a plethora of things.  Sheets of bark were perfect as paper substitutes.  Applied to roofs, it provided a level of waterproofing against the rain.  You could mould the bark into shoes, or use strips woven together to make baskets for soft fruit.

Canoes and boats, hats, firelighters, and rolled bark candles were all made from Birch bark.

Powdered birch helped ensure you had a pale complexion.

Leaves yield a reddish dye, while the catkins provide a sunshine yellow colour.

History: Food and Medicine

The sap of the Birch was gathered and made into wine.  This was fed to those afflicted with kidney stones, or urinary tract infections.

Tea made from birch leaves worked on gout and again on kidney stones.  The leaves are indeed full of flavonoids, a type of anti-oxidant.

Birch bark oil was used to treat skin disorders like eczema and psoriasis; the same substance was used to waterproof boats.

In the north, after a sauna you can stimulate circulation by beating yourself with a birch stick.  And, while we’re on the topic of beating, the dreaded old school cane was often made of birch.

Birch and Wildlife

Birch woodland has a light, airy canopy.  This proves excellent for wild flowers like Wood anemone, Violets, Bluebell, and Wood sorrel, as well as for mosses.

Over 300 insect species are associated with birch, including a lot of aphid species.  In turn, this means that Birch trees are great for ladybirds who feast on the aphids.  Moths such as Angleshades, Buff tip, and Kentish Glory have Birch as host plant for their caterpillars.

Birds use the birch too; siskin and greenfinch eat the seeds while woodpecker nest in tree cavities.

Fungus are common on the woodland floor with Fly agaric, Woolly milk cap, Chanterelle, and the Birch polypore closely associated with the birch.

Fly agaric Amanita muscaria

Threats

The threats to Birch in the UK are limited,  Plantations can fall prey to Birch dieback, which is caused by two fungal species.  However, self-seeded trees seem more immune.

As with every single species, the climate emergency presents challenges to birch trees living very far north.  However, it’s probably the Downy birch tree’s incremental growth further and further northward that forms a more immediate ecological threat.

Conclusion

Birch are elegant ornamental trees, instantly recognised thanks to their white bark.

With links to protection and fertility, and the ability to heal skin diseases and be used for building canoes, it’s a fascinating tree.

The most common tree in the whole of Scotland, and stretching across vast swathes of the planet, the Birch is worthy of our respect, and love.

Online sources for this blog include websites of The Woodland Trust, Kew’s Plants of the World, Tree guide UK, Trees for life, and Naturespot.  Reference books for this blog include the excellent The Greenwood Trees by Christina Hart-Davies  , and the Reader’s Digest The Field Guide to the Trees and Shrubs of Britain (out of print but commonly available second-hand).  I also referred to The Tree Forager by Adele Nozedar and The Living Wisdom of Trees by Fred Hageneder.

The post Trees: Birch appeared first on Lizzie Harper.

Beech trees are common across Britain, favouring chalky soils.  The oldest Beech trees live up to 400 years.  You’ll find them in open spaces and in woodland and can tell them straight away by their smooth bark.  The trees produce beech mast which is nutritious for animals, and the canopy supports wildlife.  Beech wood is used in furniture making, and has links to the earliest of books.  It’s associated with knowledge and femininity, and has been used to treat ailments and as food.

This is one of a series of blogs I’m writing on common British trees.  You can also see blogs on the Elder, the Yew, the Ash, the Oak, the Holly, the Sycamore, the Rowan, and the Hawthorn.

Identification: Tree shape

The Beech grows up to 30m tall, and its’ shape varies according to where it’s growing.  In open fields, the branches spread into a wide canopy.  In confined woodland there are few side branches and a much straighter silhouette.

Identification: Leaves

In spring, as they unfurl, Beech leaves are a bright acid green, and are covered in downy hairs.  As they mature they become a more modest green, and in autumn have a pretty consistent warm tan colour.  Leaves are 4 to 9cm long, and are oval with smooth but wavy margins.  They’re arranged alternately.  Each leaf has 5 to 9 pairs of veins.

Leaves overlap, making an umbrella-like canopy with shields the floor below from rain.  They also are rich in lignin, which means they decompose slowly. This means the woodland floor is often a difficult habitat, dry and carpeted with persistent crunchy leaves.  You could know you’re in a beech wood by sound alone.

Beech trees hang onto their leaves through winter, which is known as macrescence.

Be aware that the common Copper beech is a varient of this native species.  It looks similar, but the leaves are a dark maroon instead of green.

Identification: Flowers

Male and female flowers are carried on the same plant, and are pollinated by the wind.  Female flowers grow in pairs, within a little cup.  Male flowers are catkins carried on long, tassel-like catkins.  Flowers appear as the young leave emerge in spring.

Identification: Fruit

Beech nuts are known as mast, and consist of three triangular nuts encased in a spiny case.  This splits open, revealing the chestnut-brown nuts surrounded by a pale velvety lining.

They’re produced in real abundance once every four or five years, which is known as a mast year.

Identification: Bark and buds

Beech bark is really distinctive.  It’s very smooth and pale grey.  It stretches as it grows, so when names are carved on beech trees they become distorted over time.

The bark is sensitive to sunlight.  If an older tree is suddenly exposed to a lot of direct sun, the bark will get “sunburn” and this can kill the whole tree.

Buds are distinctively pointed and slender, reddish brown and with a clear criss-cross pattern.  No other trees in Britain have quite such pointy buds, which (along with the bark) means it’s easy to identify in winter.

Similar species

Because of the smooth bark and persistent leaves, beech isn’t readily confused with other trees.  Hornbeam Carpinus betulus has similar shaped wavy leaves, but these have teeth on the margins

History: Folklore

Beech trees have been associated with knowledge and femininity.  In Britain, the Beech is sometimes called “the queen of the woods”.  Romans had sacred beech groves, some dedicated to Jupiter, and some to Diana, Goddess of animals and the hunt.

Writing and learning have associations with the Beech, possibly because of its links to the invention of the book.

In Westphalia, in Germany, up til the 18^th century there was a tale that babies weren’t brought by the stork, but found in the hollows of Beech trees.

Finally, druids often used beech twigs for water divination.

History: Mankind and Beech wood

The wood of beech is hard and heavy, but not tough.  It’s no good for building as it can’t bear weight, but responds well to steaming so has been used to make the backs and legs of Windsor chairs and other bentwood furniture.  Trees were often pollarded for this purpose.

The wood burns hot, and was used in industry – fuelling fires for iron, glass, and charcoal production.

Beech mast is over 50% oil, so the nuts have been used as a source of furniture polish.  Meanwhile the leaves, non-degrading and persistent were used to stuff (presumably very noisy!) mattresses.

Beech tar was used as glue from paleo to mesolithinc times.

Before the invention of paper, thin slabs of beech wood were used to write on, and sometimes bound into prototype books.  There’s evidence of this in Germany in the 1300s.  There’s some suggestion that Guttenburg had the idea for his historic press after writing on beech wood and noticing the pressure made a print on the page below.

History: Food and Medicine

The beech mast is highly nutritious, providing oil and protein, but is very difficult to access.  In general, it was fed to cattle, goats, pigs, and sheep who foraged in woodland, or gathered up and fed to overwintering livestock.

However, in times of hardship, and until the Iron age, beech mast was roasted and made into flour.  In France, the roast mast was used to make a coffee-like drink.

Newly emergent leaves are tender and can be used in salads and soups.

Beechwood tar was used as chewing gum, and I’m sure even in my childhood in the 1970s you could buy packets of Beech nut chewing gum,

Medicinally, Beech was used to treat bronchitis and has astringent, antiseptic and disinfectant properties.  These were recognized by early Europeans and by the First Nations People in the Americas, who used bark preparations to fight fever.

It’s also used to treat animal hoof ailments, and in soap production.

Beech and Wildlife

The unusually shady forest floor found in beech woodland initially seems devoid of life.  However, some rare plants like the Coralroot bittercress and Red helleborine love these conditions, as do fungi.

Truffles can grow here, and in the past beech woods were planted to encourage them.

Moths feed on the leaves, namely the Olive Cresent, Barred Hook-tip, and Clay triple-line species.

Wood boring insects and larger animals like woodpeckers often make their homes within the tree.

The beech mast feeds a whole ecosystem; from voles to badgers, squirrels to jays, mice to great tits, woodpeckers to nuthatches.

Threats

When compared to other British tree species, the Beech isn’t in too much trouble.

At around 200 years old they can develop core rot in they’re growing in an environment low in tannic acid.  Basically, this means anywhere without Oak trees growing nearby.  This can kill them.

The trees can suffer root rot, caused by fungus like Phytopora,

Beech bark disease is caused by scale insects and a canker fungus.  This causes lesions to appear on the bark every year.  Eventually, these encircle the tree and thus can kill it.

However, a swifter way for a Beech to be “girdled” is when Grey squirrels come and strip all the bark off.  This can soon result in death and is especially problematic in younger trees.

Conclusion

The Beech tree is common, easy to spot, and useful.  With the smooth bark, pointy buds, and over-wintering orange-ish leaves, it’s easy to identify.  Although not used in building or as food; the wood and beech mast has proved vital over the centuries.  From chair backs to chewing gum, charcoal production to ancient flour, livestock feed to books, fevers to ancient glue; the Beech tree has served mankind well.

They’re pretty trees, and well worth a closer look next time you’re in a woodland with crunchy leaves underfoot.

Online sources for this blog include websites of The Woodland Trust, Kew’s Plants of the World, Tree guide UK, Trees for life, and Naturespot.  Reference books for this blog include the excellent The Greenwood Trees by Christina Hart-Davies  , and the Reader’s Digest The Field Guide to the Trees and Shrubs of Britain (out of print but commonly available second-hand).  I also referred to The Tree Forager by Adele Nozedar and The Living Wisdom of Trees by Fred Hageneder.

The post Trees: Beech appeared first on Lizzie Harper.

I recently illustrated The Hidden Universe by Alexandre Antonelli.  This image of the zonation of a rocky shore ecosystem was one of the illustrations.

The timing of this illustration was an extraordinary stroke of luck.  Alex wanted a drawing that shows the different animals and seaweeds on rocky shores.  These plants and animals grow in different zones going up the shoreline.  The factors that cause these differences (also known as zonation) include physical forces such as salt levels, dehydration, physical damage from the waves.  There are also biological, or biotic factors at play, such as predation, competition for food, and competition for space.

How do I know?  Well, the week I started this project, I went on a fabulous weekend course.  All about Discovering life on rocky shores!  The course is hands on, so I took tons of photos and copious notes.  I sketched barnacle speciation, and shrieked with delight at Porcelain crabs.  I even saw my first blue-ray limpet.

My very poor photo of Blue-ray limpets

So when this illustration turned up, I was exceptionally well equipped.  Here’s the pencil rough, which I annotated so that it made a bit more sense.

Annotated rocky shores illustration

And here’s the final illustration.  Inking it up was an absolute joy, although it took a great deal longer than I would have liked!

Rocky shore line ecosystem zonation of species

In this blog, there are so many animals and plants discussed, that I’m taking the decision not to give every scientific name.  It’s just be a jumble of italicised Latin if I did. Apologies in advance to the purists among you!

Rocky shores: Splash zone

The very top of a shore is known as the splash zone.

Sea plantain Plantago maritima

The top zone has very little growing there except for the odd brave plant and Xanthora lichen.  you might get tough periwinkles, but the combination of dry and salty splashing is lethal to most organisms.

Plants that do survive here have amazing adaptations to allow them to tackle the salt.  They’re known as Halophytes, and I wrote a blog on them a while back.

Animal wise, shore flies visit, and slaters (relatives of woodlice) crawl about.  You get limpets, clinging on and anchoring themselves to the exact same spot for most of their lives.

Thrift Armeria maritima

Rocky shore Intertidal zone

Lower down, you’ve got the high tide or intertidal zone.  Animals and plants living here have to handle massive fluctuations in temperature and being out of water for 12 plus hours every day.  the crashing waves cause physical damage.  On the plus side, it’s so hard to survive here that there’s not a lot of competition.

Limpet (with mating barnacles on the side)

Chitons, whelks, winkles, and barnacles live here alongside hardy sea anemones and the toughest of all seaweeds, channelled wrack.

The whelks travel around when the tide is in, predating on mussels and other bivalves by drilling a hole through their shells and sucking out the meat.

Detail of the intertidal showing chitons, whelks, and a sea anemone

Rocky shore Mid tidal

This stretch is exposed for shorter times between tides.  There’s less wave action as a lot of the time the area is submerged.  You need to handle the changes in temperature and salt, but it’s a less extreme environment than the upper tidal or splash zone.

Mid tidal zone: Crab and Breadcrumb sponge with coral weed

More animals and plants live here.  Tons of shells like top-shells, barnacles, Perwinkles, and mussels, hang out amidst the seaweeds.   Different species of top shell and winkle favour different areas of the rocky shore.

Topshell

You can tell Periwinkle and Top-shell species apart by the shape of their operculum, the door at the bottom of their shells.  In top-shells this is invariably round.  Periwinkle operculum are tear shaped.

Detail of the mid tidal: Smooth periwinkle, Pin cushion starfish, mussels and bladderwrack

There are more sea anemones, and visiting shore crabs.  Sponges and starfish abound.

The drawback is that there are more animals surviving here, so there’s more competition for space.  Predation kicks in too, with the starfish feeding on mussels, flat periwinkles chewing seaweeds, and whelks feeding on bi-vales.  These are the biotic factors starting to kick in.

If space does become free, it’ll quickly be re-colonised.

Rocky shore Mid tidal: Barnacles

Barnacles have a good system; they can grow on top of other shellfish, and can extend their filtering arms from this substrate.  Barnacles are actually crustaceans, related to crabs and shrimp.

Free living barnacle larva land on intertidal rocks where their heads split and they establish themselves for a stationary life.  They filter food particles form the sea with their legs, which are adapted to work as sieves.

The problem with living on a shellfish is that if and when that shell dies, you get plunged to the floor where it’s every likely you will die.

Blue mussels Mytilus edulis with barnacles and bladder wrack

Rocky shore Mid tidal: Seaweeds

Seaweeds thriving in the mid-tidal zone are bladder-wrack, egg-wrack, toothed wrack, spiral wrack.  These grow at very specific heights along the shore, depending on their adaptations and tolerance to heat and dry conditions.

Bladderwrack Fucus versicolor

Rocky shore Lower tidal zone: Species

The lower tidal zone is altogether more comfortable.  Exposure to air, desiccation and the heat of the sun is far less frequent.  In fact, it only happens at low tides.  The waves are less problematic.

The bladder wracks give way to kelp.  Brown algal wracks are unpalatable to most animals.  In the UK, it’s only the Flat periwinkle that can handle eating it.  Oar weed and sugar kelp are an entirely different prospect and are clearly much easier to eat.  If you are lucky and look closely at low tide, you might see the tiny and stunning Blue-ray limpets grazing on a blade of Oar weed.

Edible crab, sea urchins, tube worms, star fish, brittle stars, more sea anemones, sea lemons and nudibranch hang out here, along with bivalves.

You also see Porcelain crab with their strange, squashed bodies.  Decorator crab, often festooned with bits of seaweed can be seen too.  Hermit crabs spend much of their time in this zone.

Lower tidal zone: Spiny Decorator crab, Sugar kelp, and blue ray limpets

Rocky shore Lower tidal zone: Biotic factors

Flip side? Biotic (rather than physical) factors. Far more predation.  And intense competition for space and things to eat.  Of course, with the physical factors being so much easier to handle, many organisms will migrate from this zone to the Mid tidal once the sea covers them.  There they can eat and predate on other species before retuning to the safety of the lower shore before the tide exposes them again.

Rocky shore Lower tidal zone

You even get sun-stars.

The biological factors such as predation and competition are extreme here.  Predation is fierce.  And competition for space in intense.  Yes, you don’t get smashed up by waves or dried out twelve hours a day.  But you do get eaten, and may well find it impossible to get a foothold in such a heavily populated zone.

Seahorse family groups

Some seahorse and pipefish species will spend time in this zone, although drying out is a real problem for them, so they tend to stay in the sub littoral.

Rocky shore: Sub littoral

Below the lower tidal zone is the sub littoral.  This area of the shore is never exposed to the air, not even at the lowest of tides.  It tends not to figure in rocky shore zonation as it’s more like shallow ocean than the shore.  Fish, crabs, lobster, kelp forests all abound here.

American lobster Homarus americanus

Complicating factors: Rockpools

Rockpools are vital for lots of these organisms, although they can suffer from enormous halinity and temperature fluctuations.  But to the aspiring rocky shore ecologist, rock pools can be confusing,  As they remain wet, you get organisms living there that should not be seen in the Upper tidal zone, or mid tidal areas of the beach.  Luckily, this is catered for by ecologists who examine rock pool life as a subset of the larger ecosystem.

The illustration above was done many years ago.  I now know that brittlestar (lower littoral specialists) and razor clams (sand living specialists) are unlikely to appear in any European rockpool.  You live and you learn.

Complicating factors: Exposure

It should also be remembered that the exposure of a rocky shoreline will have an enormous effect on the life there.  High exposure means it’s even harder to exist in the splash zone and Upper tidal.  More sheltered shores offer an easier existence.

Conclusion

This is truly a whistle-stop tour of the zonation of the rocky shoreline.  I have no doubt this blog is peppered with mistakes.  The FSC course tutor, John Archer Thompson probably has his head in his hands as he reads my version of his wonderful teaching.

As an excellent launch pad to much more on this subject, thanks to John, please check out his FSC rocky shore pages.

The post Rocky shore ecosystem illustration appeared first on Lizzie Harper.

The Yew tree Taxus baccata is a common tree in Britain, especially in graveyards and hedgerows.

There’s a lot of folklore associated with this species, and it’s important both in modern medicine and for wildlife.

Identification: Tree shape

Yew trees grow up to 20m tall with a spread of up to 10m, and can form trees or shrubs.  Their shape is highly variable because of the growth habit of the tree.  In many cases, Yew loses the heartwood from the tree trunk as it ages, leaving a hollow tube full of powdery rotten wood.  These trees grow incredibly slowly and are notorious for being extremely long-lived.

This makes an excellent substrate for new yew trees to grow in.  New trees grow from exploratory rootlets sent out by of the established Yew.  It’s common to see a younger Yew growing inside the “nursery” of an older mother Yew tree trunk.  As a result of this, establishing exact ages of Yew trees can be really tricky as they rarely have the heartwood needed to count annual tree ring growth.

However, dendrologists have found yews 1,500 years old, and many believe it’s perfect possible that some trees can be up to 3,ooo years old.  Quite an amazing thought.

Yew tree Taxus baccata

Often found growing in churchyards, yew trees are also used as hedging plants.  They grows happily in the shadow of other trees, and  frequently appear in the understory of mixed woodland.  It is found planted in formal gardens.  They thrive on chalky soils and are resistant to pollution.

The association with churchyards is several-fold.  First, yews were used for weapons, so it was a good idea to have yew trees around.  But why the graveyard?  Well, yew is poisonous to grazing livestock as well as to man.  Having yew in a churchyard guaranteed people wouldn’t graze their flocks on consecrated ground, but still allowed the trees to be grown.

Identification: Leaves

The leaves of Yew are evergreen, so are found on the tree year round.  Yew leaves are flattened dark green needles, arranged along the branches and twigs in two rows, or spiralling.  Each one is 1 -3cm long.  They have a sharpened tip, and may look slightly shiny.  You can see a central rib on the leaves, which is especially clear on the underside.  The leaf underside is a pale greyish-green colour.  Needles are not arranged directly opposite one another.

Sprig of Yew showing dark green needles with paler undersides

Like all of this tree (except the red fleshy part of the fruit), Yew leaves are highly toxic.  As little as 50 – 100g of chopped yew leaves can kill an adult human .

Identification: Flowers

Yew trees are dioceious, meaning trees are male or female, each bearing male or female flowers.

You may not notice yew flowers as they are small and inconspicuous.  This is because they are wind pollinated, so have no need to expend energy of showy petals and nectar treats for possible pollinators.

The flowers are in the joins between the leaves and the stem. In males, the flowers are clustered together,  Female flowers are borne singly or in pairs.   Each flower is tiny, males as little as 3mm.  Pollen is released in February by all flowers, and berries appear in late summer.

Male flowers are round and green, with many stamens.

Sprig of yew with male flowers and a close up of the Male Yew flower. Detail below shows the froth of stamens

Female flowers are also greenish, although they become brown with age.  They’re scaly, although interestingly they are not cones.  This distinction is a conundrum for botanists as the yew is classed as a Conifer, which literally translates as “cone bearer”.  But no cones are produced by this tree.

Each female flower has a single ovule at the centre of these scales, awhich (once fertilized) will develop into a red fruit

Female Yew flower showing scales and emergent pistil

Identification: Fruit

The yew berry isn’t a true berry, but a seed that grows within an aril.  These “berries” are instantly recognizable.  They’re a pinkish red, matt, and fleshy.  Although this fleshy aril is the only part of the yew which isn’t highly toxic, I’d advise against eating it.  not least because the seed within is the MOST toxic part of the tree!

These are actually highly modified cones which grow around the seed.  you can see the lone seed peeping out from one end of the cup of the aril.

Berries are 3 – 7 mm long and become ripe from October, many staying on the tree through the winter.  Because of this, they’re a valuable winter food source for wildlife.

Yew berry showing seed at centre of the red aril

Identification: Bark

The bark of the Yew is scaly and a light red brown, or sometimes appears purplish.  Where it flakes off, it shows redder areas below. When wet, the bark can look almost blood red.

Branches and larger twigs are also a reddish brown, although the most recently grown needles are borne on yellow-green stems.  These become brown over time, normally in 3 to 4 years.

Another trait of the Yew that rather confuses its’ classification as a conifer is that is has no resin.  Pines, spruce, and Firs are all resinous, a fact you’ll know if you’ve ever got the sticky gum on your hands whilst collecting pine cones.

Similar species

The only species you might confuse with the Yew is other Yew species, such as the Irish yew.  This differs in having curved needles.  A range of species of yew are planted in gardens, but most in the wild will be the Common or European Yew Taxus baccata.

You can tell a yew from other conifers because of the purplish-brown bark, green young shoots, and (of course) the red berry-like structures.  Yew needles often appear a darker and glossier green than many other conifers.

History: Folklore

Yews are ubiquitous in folklore across geography and religions.  Ancient Greeks associated them with the dead, seeing them as gate keepers to the other side.  They believed if you fell asleep under a Yew you were likely to die (this was first mentioned by the physician Dioscorides in 77AD).

Pre-Christian religions held the Yew in high esteem as a tree symbolizing immortality, and groves of Yew were sacred sites long before Christians began building churches in Britain.  In fact, early Christians chose to build churches near sacred Yews and thus tapped into the spirituality and respect that already existed.

In 10th century Wales, the fine for chopping down a Yew tree was £1.  This becomes far more impressive when you realise that £1 was the equivalent of a life-time’s wages.

Yews figured in funeral arrangements.  Processions would carry yew branches, and throw them in the grave before lowering the coffin into the earth.  It was also used in graves of plague victims, although no-one seems sure why.  There’s a suggestion Yew may have been seen as a way to protect and purify the dead.

However, the Yew’s association with death was never fearful.  It knit closely to the way the tree seemed to live eternally, and with themes of resurrection and immortality.  These traits carried neatly from pagan to Christian religion, and the yew is associated both with Easter (Jesus’s resurrection) and with the virgin Mary (eternal goddess figure).

There is also some suggestion that the ancient Norse tree of life, Yggdrasil, may have been a Yew not an Ash.

History: Mankind and Yew wood

The sheer scale of time that has seen mankind associating with Yew trees is worth a mention.  This may be due to the spiritual properties associated with tree, but also relates to the incredibly tough wood the tree produces.

The oldest man-made artefact ever found is a spear made of yew-wood carved to a deadly sharp point.  This extraordinary item is dated at 420, 000 years old, thus pre-dating the evolution of modern Homo sapiens.  Just stop for a moment to take that date on board.  It blows my mind, not least because the wood was still perfectly recognizable when discovered. (For more, see The Clacton Spear).

The Clacton spear, made of Yew and dating back more than 420,000 years

Another remarkable discovery was a bow carried by Ötzi.  Ötzi is a mummified corpse found in the Tyrolean alps, between Austria and Italy.  He dates back 3,500 years and has been massively important in helping archeologists figure out how people lived (and died).  His bow was made of yew and was both strong and flexible.

History: Food and Medicine

Never eat Yew.  As mentioned before, it’s highly toxic.  And although the fleshy red aril is theoretically edible, even this has been known to cause vomiting.

However, in recent times, Paclitaxal (formerly Taxol), a compoud derived from the pacific Yew, has proved remarkably effective in the treatment of cancer.  It’s a component of chemotherapy treatment for lung, breast, ovarian cancer and Kaposi’s sarcoma.

Me doing a pencil drawing of a Yew sprig

In earlier times, people knew about the toxicity of yew and it was used as a suicide drug.  The chief of the Eburones, Cativolcus, chose to take yew rather than to yield to the Roman army, as did the Cantabrian and Astures armies (Redzet).  It’s the taxane alkaloids that prove so toxic, and yew poisoning results in breathlessness, fever, convulsions, and eventual heart attack.

Uses

Yew is a very slow growing and fine grained wood, with a rosy red colour.  It polishes beautifully and is waterproof, incredibly strong, and elastic.

The wood was used to make bows through history, like Otzi’s.  Bows used at the battle of Agincourt were Yew.  It’s also good for tool handles.

Waterproof qualities mean it was used for the pilings in Venice as it was resistant to rotting.  Recently, when old yew pilings were removed, they were in brilliant condition despite having been submerged for hundreds of years.  In many cases, they were sold on as usable reclaimed timber. (Hageneder).

Hedges can be made from yew as it grows thickly, forming good barriers.  Most mazes are made from yew (including the iconic Hampton Court palace maze), which will form a good wall in about seven years.

Yews and Wildlife

The sweet, glutinous berries of yew are much prized by members of the thrush family.  Blackbirds, fieldfare, thrushes as well as other birds like greenfinch glut on them in autumn.  The berries stay on the tree through winter, making this a valuable resource.

Small birds such as fire-crest and goldcrest make their nests in the thickets of yew hedges.  And small mammals like dormice and squirrels will also feast on the sweet berries.  (Please note that the dormouse pictured below is not eating yew.)

Hazel dormouse Muscardinus avellanarius

Yew is the foodplant of the Satin beauty moth, Deileptenia ribeata.

Threats

Threats to the Yew tree are limited.  However, climate change may cause problems, and is is susceptible to root rot.  A while back, the Yew was over-harvested for Taxol medicines.  Thankfully this is now manufactured in the lab.

Conclusion

The Yew is an important tree in the landscape and in human experience.  Drenched in pre-history and spiritual associations, it also bears amazingly strong wood, and has helped with potentially life-saving cancer drugs.  It’s also unusual.  It’s a conifer but not quite a conifer.  It is somehow immortal because of its growth habit.  It’s highly toxic yet the source of life-saving medicines.  Associated with graveyards and funerals, it also symbolises resurrection.  It’s these peculiarities that make the Yew stand out, and earn it’s place as one of the most interesting of British trees.

Online sources for this blog include websites of The Woodland Trust, Tree guide UK, Trees for life, and Naturespot.  Reference books for this blog include the excellent The Greenwood Trees by Christina Hart-Davies  , and the Reader’s Digest The Field Guide to the Trees and Shrubs of Britain (out of print but commonly available second-hand).  I also referred to The Tree Forager by Adele Nozedar and The Living Wisdom of Trees by Fred Hageneder.

I’ve published a film on youtube to accompany this blog.  It shows me drawing a pencil line illustration of a sprig on yew from a specimen, and was made in response to requests for films showing me drawing and composing an illustration, not just painting botanical subjects.

The post Trees: Yew appeared first on Lizzie Harper.

Cover of The Hidden Universe (not my artwork)

Alex discusses the importance of biodiversity from a genetic to an ecosystem level.  He talks about the impact and importance of the climate emergency, and presents the reader with lots of entirely new examples to ponder.  The book is full of optimism too, detailing what we can all do, and what is already being done to wrestle back our planet into a salvageable home for all of life.

He’ll be appearing at Hay festival on May 29th (11.30 – 12.30), talking about the book.

The Hidden Universe: Pencil roughs

I got a detailed list of illustrations.  There were about 20 on the list, and between me, Alex, and the art director; we whittled it down to around 14.  This was surprisingly easy, and all my favourites are included.

The subject matter for the illustrations is extremely diverse, and often challenging.  Some are simple, such as the extremely rare Cretan orchid Cephalanthera cucullata.  Others have multiple elements. like the hedgehog in a log-pile.  Three are extremely complex (Wolves back in Yellowstone park, Beaver in Tierra del Fuego, and Rocky shore zonation.

Cretan orchid Cephalanthera cucullata

I drew up all of the illustrations in pencil, and was delighted when the returned feedback was overwhelmingly positive.  I was especially relieved about the three toughest ones.  The background skyline of one needing altering, but none of the animals did.

Yellowstone national park showing re-wilding

One illustration, the extinct Thylacine or Tasmanian wolf was a matter of choice.  I provided two pencil roughs for Alex to contemplate.  He chose the one he feels is more engaging, the top one.

Thylacine rough x 2  Thylacinus cynocephalus

Below is the final inked up version.

Thylacine Thylacinus cynocephalus

The Hidden Universe: Yellowstone and Re-wilding

Instead of listing the illustrations I did for this project, or discussing the drawing process; I’m going to talk about a couple of them in detail.

First up is the rough I’ve posted above, Yellowstone national park, and re-introducing the wolf.

In the illustration below, a wolf pack hunt an elk.  Behind is the craggy landscape of Yellowstone national park, and (importantly) lots of trees.  There are more deer in the background, and a bison.  This illustration illustrates two ecological concepts.  The first is re-wilding.

Wolves hunting deer in Yellowstone National park

By re-introducing wolves to the park, you balance the deer population.  Less deer means less grazing on young trees.  More trees means more birds and other associated wildlife.  More wildlife means more recycling of nutrients in the ecosystem.  It’s a healthier place to be.  I first read about this example years ago in George Monbiot’s Feral.  I never thought I’d have to try to explain the story in an illustration!

The second concept is linked.  It relates to the idea of keystone species and a biological or ecological cascade.  Some species are vital and make the whole web of life in a habitat work well.  Take one species out, the keystone species, and the whole natural system collapses.  This happened in Yellowstone.  All the wolves were hunted or removed by man.  Remove a top predator like the wolf from a system, and it can trigger what’s known as a trophic cascade.  Too many deer, not enough trees, no associated wildlife…the system collapses.  It’s  why the re-introduction of wolves to Yellowstone is so exciting (and so very successful).

The Hidden Universe: Beavers and Tierra del Fuego

Another of the illustrations involving a lot of work was the beaver dams in Tierra del Fuego, an archipelago off the coast of Chile and Argentina.

This seemingly charming image tells a darker tale.

Fifty Beaver Castor canadensis were introduced here by man in the 1940s.  (Introduced species are almost inevitably introduced to very new and far-flung location by man).  The theory was that they would breed, and a fur industry could be established.  They began to do what beavers do.   Breed.  Fell trees, and build dams.  The dams create large pool and alter the water courses.

Close up of a Beaver

In many places, this is totally beneficial.  Beavers have recently been re-introduced to Devon, in the UK.  Their landscaping has had massive and many unexpected benefits to the local area.  Flooding is less.  The slower flowing water creates new habitats and havens for wildlife.  Even the water quality is improved as the dams act as filters.  For more, read about the Devon beaver re-introduction here.

Beavers and dams in Tierra del Fuego

Why Beavers in Tierra del Fuego did not work out

However, Tierra del Fuego is a closed system.  This means there are only a limited number of trees, and as it’s an archipelego of islands, new colonising species are infrequent.

The beavers have no natural predators here, so have bred very successfully.  In Canada, where they were imported from, wolves and bears prey on them.  By 2011, there were estimated to be 200,000 beavers in the area. (NPR 2011)

Problems include flooding, which damages other vegetation.  Trees in South America did not evolve alongside beaver (in the UK, beavers were present until only a few hundred years so, so there was co-evolution).  These trees die rather than regenerate when coppiced by beaver.

Many of these trees are protected species.  Many are already dead or dying.

The resulting chaos and scenes of devastation mean that a cull is almost inevitable.  As Professor Anderson,  from the Universidad de Magallanes, says, “The change in the forested portion of this biome is the largest landscape-level alteration in the Holocene — that is, approximately 10,000 years” (Nature 2008)

It is not an edifying example of man interfering in nature.

Hidden Universe: Hope and A Hedgehog in a log-pile

The last illustration I want to talk about is the hedgehog in the log-pile.

This image comes from a lovely section of the book.  Alex fills the pages with suggestions of what we can do to save what we have.  Examples of things that are already being done.

Hemp from Cannabis sativa

How making cloth and ropes and twine from hemp is a really good alternative to cotton.  The plant is far less water-hungry, and farming it can be much more ethical and ecologically sound.

Fungus, the solution to a whole lot of problems.  It can (and should) be further exploited for food resources, but has other applications such as the building trade (see my guest blog on this from years ago for more).

Oyster mushroom Pleurotus ostreatus

There are lots of other examples.  Some I illustrated, some I didn’t.  All gave pause for thought, and many gave hope.

Hidden Universe: A Hedgehog in a log-pile

Which brings us onto the hedgehog.  It’s drawn by a mouldy log pile in amongst long grass.  Nettles and ivy are established.  To a traditional gardener, it’s a messy scene.

Hedgehog

This illustration shows how easy it can be for a lone individual to do something small, but which makes a tangible difference.  Allow a corner of your garden to get overgrown.  Don’t pull up nettles.  Leave a few logs and sticks in a corner.  Let the grass grow long.  leave the area undisturbed.

You may find you’ve made the perfect home for a hedgehog.

hedgehog

Even if not, the longer grass is wonderful for insects, spiders, harvestmen.  In turn, this is beneficial for the small mammals that feed on them.

Allowing nettles to grow provides food for caterpillars of both the Small Tortoisheshell and the Peacock butterfly.

The logs themselves allow all sorts of fungus and bracket fungi to thrive, which in turn breaks down the wood and helps return the nutrients to the soil.

Detail of log pile with fungus

It’s all so good.  And all so easy to do.  Wildlife gardening (for this is what we’re talking about here) doesn’t have to be difficult.  It can be as easy as letting a corner get overgrown.  And the benefits to the entire ecosystem are enormous.

Conclusion

So there you have it.  The tale of three illustrations from The Hidden Universe.  It’s a book that’s well worth reading, not least because it doesn’t end up filling one with a sense of apocalyptic dread.  There are things to do, and things being done.

Cycnoches guttulatum orchid with Euglossa cybelia orchid bee

It also shows how enormously fortunate I am to have the job I have.  Every illustration I do entails some learning.  Sometimes it’s botanical details.  Occasionally it’s how to reconstruct an extinct animal.  This time, it was both of these; and how to illustrate entire ecological systems and concepts.  Does it make my brain ache?  Yes.  Do I love the learning?  Yes, indeed.  Am I the luckiest illustrator on the planet?  Well I might be biased.  But I reckon I could easily be.

For an extended look at another of the Hidden Universe illustrations, the zonation of a rocky shoreline, I plan to produce a detailed explanation in a future blog.

Rocky shore ecosystem

The post The Hidden Universe: Pen and Ink Illustrations appeared first on Lizzie Harper.

The Elder Sambucus nigra is common in hedgerows and woodland, and appears as a shrub as often as a tree.  It has strongly scented blossoms in spring, deep purple berries in autumn, and pale wood.

There’s an enormous amount of folklore associated with this species, and it’s a firm favourite with both foragers and those interested in herbal remedies.

Identification: Tree shape

Elder grows as trees up to 10m, or as shrubs.  Branches are often curved, and the wood is brittle.  Elder trees have short trunks or “boles”.  Compared to other tree species, elder don’t have loads of branches, and these grow from low down.

Elder tree

You often see Elder trees in thickets or scrubby woodland, or growing alongside streams with a variety of other species.  If an Elder is given space and light, it’ll grown into a tree.

Elder shrubs are common too as the species shows in both growth habits.  Lots of branches emerge at ground level, forming a thicket of a bush.

This species loves nitrogen-rich habitats, and will colonise anywhere where people have lived, or where nitrogen levels are high in the soil (such as fields where animals have been grazed).  It grows fast, and establishes itself quickly.  If you see a tree growing from a wall or in a farmyard, it’s very likely to be an Elder.

Identification: Leaves

Elder leaves are compound, that is made of lots of leaflets (for more on leaf shape, check out my blog).  In this case, there are 5 to 7 leaflets, with one terminal leaflet.  Leaflets are opposite each other.  Although the leaves have a relatively long stalk, each individual leaflet lies close to the stem.  Each leaflet is 3 to 9 cm long.

Elder leaf and pencil study

The leaves of Elder are oval and a bright pale green.  They’re toothed along the margins. (Click here for my blog on leaf veins and margins).

Elder branch with two compound leaves (each made of five leaflets)

The venation of the leaves isn’t very obvious, and is rather similar to that of lots of other oval leaves.  Side veins branch from the central mid-rib, and are mostly opposite one another.

Elder leaves

Some people think Elder leaves smell nasty, and although they do let off a pungent odour when bruised, I wouldn’t call it unpleasant.

Identification: Flowers

The creamy froth of elder flowers is instantly recognizable, by smell as well as by sight.  The smell is a heady perfume, and one of my favourite scents of summer.

Flowers cover the tree or shrub, borne in flat-headed umbels. Each umbel is 10 to 20 cm across; individual flowers are 5mm across.  Looking into the branching structure, you can see there are five main rays to each umbel.

Sketchbook study figuring out flower growth pattern

The flowers are closely packed, and have cream or white petals.  Anthers are a creamy colour too.  Each individual flower has five rounded petals, and 5 stamens.  Anthers protrude beyond the petals, helping the umbel look even frothier.

Small flies pollinate the flowers, which may explain why the scent of the blossom is so heady and heavy.  Elderflowers appear in May or June and will be in flower for 4 to 6 weeks.

Individual elder flowers

Identification: Fruit

Elderberries are shiny and black when fully ripe.  The branches they’re borne on are frequently flushed dark magenta.  Unripe berries are crimson.  Each berry is square-ish, and very juicy.

Sketchbook study of elder berries

It’s really common to see elder berries in partial umbels – lots of the berries will have fallen off or been eaten; the remainders look scruffy because of the empty stalks along side them.  They last well into late autumn, eventually shrivelling or falling in the frosts.

Working on an elderberry illustration

The berries are very rich in vitamin A and C and provide a vital food supply for birds and small mammals.  However, they are also quite sour, and both leaves and berries are rich in Hydrogen cyanide.  This can cause vomiting in people.  For a fascinating look at poisons in our everyday foods, check out this BBC Future article I stumbled on.

Identification: Bark

The bark of an elder tree is thick, smooth and corky; deep ridges develop with age. The branches are smooth, with pithy insides.  This pith can be removed to leave a hollow twig, and elder wood has been used for centuries to make whistles and musical instruments.

Twigs have obvious lenticels and are thick and greyish, or greenish.

The jelly ear fungus Auricularia judae is a brownish jelly-like fungus that often grows on elder and I use it as another way to identify the species.

Similar species

Some other tree species also have frothy white blossoms.  The Rowan does, but the flowers are far less scented, and the tree rarely grows as a shrub.  Guelder rose also has panicles of white flowers, but these are much larger blossoms and the leaves are a totally different shape.  The berries are orange and scarlet, never black.  However, as Guelder rose also forms a shrub, it’s worth a mention.

Guelder rose Viburnum opulus

Ash Fraxinus excelsior, Walnut Juglans regia, and Rowan Sorbus aucuparia  also have compound leaves, but the walnut leaves are arranged in an alternate pattern.  Ash leaves have more obvious veins and feel less “flat” than elder.  Rowan leaves are smaller and sharper.  All have toothed margins, but with a little experience you’ll notice differences between the shape and sharpness of the teeth.

Ash twig and leaves Fraxinus excelsior

History: Folklore

Like Hawthorn and Rowan, Elder is alive with folklore and history.  It’s interesting that all three of these trees produce highly visible white blossoms and distinctive colourful berries.  I guess they were easily recognized, common, and therefore very much in people’s awareness for millenia.

Elder has long been associated with “the little people”, and those who believe in faery folk will be very familiar with it.  If you were lucky, you might see the Queen of the Fairies passing by under an elder on Midsummer eve.  Lots of references advise against sleeping under an elder; this also relates to belief in other-worldly peoples.

Elder shrub

If you had to chop down an elder tree, you were supposed to ask permission from the Elder mother, a female spirit that inhabited the tree.

It was seen as a protective tree, and would be planted near houses and dairies.  Cheese cloths would be hung to dry on elder branches, and it was thought to prevent the milk form turning.  Interestingly, the elder leaves do repel flies, so these beliefs could have contributed to the hygiene of the dairy.  Herdsmen would carry elder switches.

Elder berries and leaves

However, there was a darker side.  A child beaten with an elder stick would never grow.  Judas Iscariot was said to have hung himself from an elder tree, and criminals were crowned with elder as a symbol of their shame.  Again on a Christian theme, there was a suggestion that the cross on which Jesus was crucified was elder wood.  It was not to be brought into the house, and if you burnt it you were sure to see the devil.  Witches could transform themselves into Elder.

The rule of thumb was to treat the elder with a healthy dose of respect.  And caution.

History: Food

The flowers of the elder can be used to make a lovely scented champagne, or fried as fritters.

Once heated, the berries can be reduced into deliciously strong-flavoured jams and jellies and syrups.

Illustrating elder berries

Flowers and berries are made into drinks and cordials.  Until 1900 you could buy spiced elderberry wine in the streets of London.

The most famous elder drink is the spirit Sambucca, made from elder berries and aniseed.  Traditionally, this is presented with one coffee bean and is set on fire as it’s served.

History: Medicine

Most parts of the elder have been used for medicine.  There’s some suggestion that even the ancient Egyptians used elderberries medicinally.  The medieval herbalist John Evelyn described elder as, “a kind of Catholicon against all Infirmities whatever”.

Berries are high in vitamins C and A, and (once you’ve destroyed the hydrogen cyanide by heating) are used to cure a plethora of conditions.  Sore-throats, coughs, respiratory problems – all were treated with elderberry syrup or “rob”.  They’re also a laxative, and diuretic.

The bark is a strong purgative.  Leaves can be crushed into poultices that are applied to bruises, sprains, and chill-blains.

Flowers are dried into tea and used to treat colds.  You can also wash your face in water soaked with elderflower to preserve your youthful looks.  Even today, elderflower is used in eye and skin lotions.  Some say that if you soak elderflower in cold water it helps relieve symptoms of hay-fever.

Adele Nozedar, whose books I illustrate, foraging for elderberries

Elder is rich in anthocyanins and antioxidants, both of which are known to boost the immune system.

Uses

There is a lot of pith in elder branches, which means when you hollow them out they make good musical instruments.  Children made small toys and penny whistles from elder wood.  The wood was also used to make pipes, pea-shooters and bellows.  Small spoons, and combs were sometimes made from elder wood.

The pith was used as a blotter, and to hold botanical specimens whilst they were being prepared for microscope slides or botanical sections.

Elder berries and leaves

Harder mature elder wood was sometimes made into cogs for machines.

The leaves contain natural fly repellent which probably explains why they were so often planted near houses and stables.

Finally, the elder is really useful as it produces a whole variety of different dyes.  The leaves give a green hue, flowers produce a lilac colour.  The berries make for deep and fade-resistant black and purples.  And even the bark was used to make black dye, used either for dying wool or ones hair.  The highly esteemed Harris tweed used elder to dye its’ materials, even though elder trees are less common in northern Scotland than in the rest of the UK.

Elder: Wildlife

The berries are eaten by birds and mammals, and the leaves are food for the Buff ermine, dot, White-spotted pug, and Swallow-tail moth caterpillars.  Insects drink the nectar from the flowers.  Voles and dormice eat flowers and berries.

Field vole Microtus agrestis

Threats

Luckily, not too many things threaten this amazing tree.  Red spider mites can suck the sap of the tree, and blackfly damage leaves.

Conclusion

Elder is an extraordinarily adaptable plant.  It’s been associated with Jesus, witches and fairies.  It can bring good or bad luck.  Berries are poisonous but can be made into delicious syrups.  The flowers can be eaten, used as a beauty treatment, or used against colds.  Elder wood makes toys, cogs, and instruments.  Personally, what I love most about elder is the smell when the flowers are out.  The buzzing of flies, the heavy scent in the air, and the rustle of leaves in a gentle breeze.  It sums up summer for me.

Jersey Post Fruits and Berries stamp issue copyright Jersey Post 2019

Online sources for this blog include websites of The Woodland Trust, Trees for life, and Naturespot.  Book references for this blog include Adele Nozedar’s The Tree Forager, the excellent The Greenwood Trees by Christina Hart-Davies, and the Reader’s Digest “The Field Guide to the Trees and Shrubs of Britain” (out of print but commonly available second-hand).

The post Trees: Elder appeared first on Lizzie Harper.

I was lucky enough to be asked to do the illustrations.  Not only am I really excited to be associated with this timely and fascinating book, but the fact that Ben is a local author is also very pleasing.

Cover of The Treeline by Ben Rawlence

The Treeline: Species list

Trees tough enough to survive in such northerly climates are not too numerous.  This means the number of species needing illustrating is limited.  Each species needs a picture of the tree itself, and an assortment of its leaves, cones, flower, and fruit.

Some are familiar, and feel like old friends.  I’m thinking of the Rowan Sorbus aucuparia, Scots pine Pinus sylvestris, Hazel Corylus avellana and Juniper Juniperus communis.  I was able to re-use some of the illustrations completed for The Living Wisdom of Trees by Fred Hageneder, thanks to an arrangement made with its publisher.

Scots pine Pinus sylvestris

In total, there are 16 species which appear in the northern boreal forests (and in the book!)  The fact that I was surprised to find some growing so far north reflects holes in my botanical knowledge.  I didn’t expect to see Aspen Populus tremuloides, Balsam poplar Populus balsamifera, Alder Alnus glutinosa, or Crack willow Salix fragilis on the list.

Being asked to do the illustrations

Unusually, Ben approached me himself.  Normally commissioning of artwork for books is done through an art editor.  I know Ben slightly as my other half has made a wonderful desk for him in the past.  So when Ben got in touch to ask if I’d be interested in illustrating his books as I was “the only illustrator he knows”, I jumped at the chance.  How fortunate that the only illustrator he knows also happens to have illustrated several books on trees!  It was meant to be.  It was good to have Ben as my commissioner as he knew exactly what features to emphasize in the illustrations.

Inking up the pencil rough of Downy birch Betula pubescens

The Treeline: Tough trees in difficult conditions

Many of the trees growing at this northern limit of the boreal forests are small and stunted by the cold.  This condition occurs across species, and is know as Krummhloz. Trees can only grow close to the ground, or beneath snow.  This is cause the arctic winds above are so damaging.  Resulting trees are often thick at a lower level.  Emergent branches and trunks are spindly, sparse, and thin.

I try to include aspects of this in the illustrations, but make sure the trees still look species specific.  In reality, the sprawling lower vegetation is more pronounced.  Perhaps I err on the side of drawing more species-typical specimens.

Black Spruce Picea marinara tree

Comparisons

Some of the trees need to be compared so that the subtle differences between species can be clarified.  This is tricky.  You’re trying to work with reference of trees from this particular habitat, often with Krummholz.  Details have to be botanically correct.  The Black and White spruce are particularly difficult to untangle, not least cause sometimes the image reference online is attributed to the wrong species!

White spruce Picea glauca

The cones are very different, but differences between female flowers in these two are hard to pinpoint.  Luckily, the male flowers are simpler.  White spruce ones grow erect, but they’re pendulous in Black spruce.

Black spruce Picea mariana

The Treeline: Drawing conifers vs Deciduous trees

Drawing a deciduous tree is harder than drawing a conifer.  With Pine and Spruce and Larch, you represent the needles with lots of tiny ink lines.  The tonality is easy to work into, and the textures flow readily from the pen.

Siberian larch Larix sibirica

Deciduous trees are more nebulous.  Shadows cast by elliptical or lobed leaves are less predictable, and giving the impression of depth and thickness of vegetation is far harder.  It’s easy to make the edges of the foliage too crisp, or to fail to balance internal shadows.

Downy Birch Betula pubescens

However, when it comes to leaves, fruit, and flowers the situation is reversed.  Give me a catkin over a larch strobilus any day!

Dahurian larch Larix gmelinii strobilus and male flowers

The learning curve with the conifers is a steep one.  I understand the anatomy of cones, but for this job I had to learn about strobilus and the different male and female flowering structures of conifers.  “You should know this already!” I hear you cry, “having illustrated lots of Pine and Spruce trees before!”  And you’re right.  But I don’t.

Downy birch Betula pubescens fruiting catkins

For more on the Downy birch, check out my  blog and youtube film showing me inking up the catkins and leaves in real time and discussing my processes.

The Treeline: Layout

Ben and the team want the details of each tree to sit together neatly on the page.  I provided them with all the different elements separately, and in one layout.  As it turns out (and as expected) the design team alter my layouts, but this is fine with me. The laying out  is actually quite fun.  I love how much smarter the illustrations look when surrounded by a border, and annotated.  Even though my layouts weren’t used in the book, I know it’s given suggestions to the designers that may prove useful.

Dahurian larch Larix gmelinii cones

And here are the same cones along with the other accompanying illustrations

Dahurian larch Larix gmelinii details

Conclusion

I haven’t been able to read the book yet, but can’t wait to get my hands on a copy.  There are a lot of books coming out which focus on the environment, and how climate change and man are altering the natural balance.  Although it can feel depressing, I truly believe these messages need to get out there.  The variety of habitats which are being changed is as diverse as life itself, and I’m keen to know more about the northern edge of the arboreal forest, and the dangers the climate emergency are causing.  This extraordinary forest even appeared on David Attenborough’s latest series, “The Green Planet” in the “Seasonal |World’s” episode, and seeing film of the snow covered trees was wonderful, and strangely moving.  Here’s rather a good review from The Guardian newspaper.

Larch Larix decidua or europea

Illustrating A Life on Our Planet by David Attenborough, and another upcoming title on the importance and fragility of life on earth (“The Hidden Universe” by director of Kew Gardens Alexandre Antonelli); I feel like I’m somehow involved in a small way in getting these messages out to the public.  And that matters to me.  It makes me proud to be associated with important and timely books like The Treeline by Ben Rawlence.

Here’s the film about illustrating the catkins and leaves of the Downy Birch:

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