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Himalayan balsam Impatiens glandulifera with details of flower, seed and seed pods, stem, roots, and growth habit.

Himalalyan knotweed Persicaria wallichii showing a plant and close up of one flower.

Giant rhubarb Gunnera tinctoria showing one enormous leaf and a crimson tinged flowering spike

Giant rhubarb Gunnera tinctoria Detail habit drawing

Giant knotweed Fallopia sachalinensis showing numerous drooping flowers, large leaves, stem section and detail of the orange underground rhizome

Few flowered leek Alium paradoxum showing flowers and fruit, with cross section of stem and one leaf.

Perfoliate Alexanders Smyrnium perfoliatum

Monbretia Crocosmia x crocosmiliiflora plant showing orange flowers and corms

Mile a minute weed Asiatic tearthumb Polygonum perfoliatum showing the distinctive blue berries and the pale green leaves.  Stems have sharp spines.

Japanese rose Rosa rugosa showing magenta petals, bright green foliage and large red rosehips

Japanese Knotweed Fallopia japonica showing subterranean roots

Japanese Knotweed Fallopia japonica without roots.  Illustration shows details of the small white flowers and winged seed.

Japanese honeysuckle Lonicera japonica showing white flowers, dark green leaves and black berries

Hybrid knotweed Fallopia japonica x Fallopia sachalinensis showing stem, flowers, leaves, and typical growth habit

Stonecrop or New Zealand Pigmyweed Crassula helmsii showing two of its three different growth habits

Spanish bluebell Hyacinthoides hispanica showing pale blue flowers and differences between this and the native Bluebell Hyacinthoides non-scripta.  For more, please see my blog on telling the difference between these species.dark anthers, blue anthers,

Skunk cabbage Lysichiton americanus showing the glossy leaves and yellow lily like flowers.

Shallon Gaultheria shallon showing white flowers, purple berries, and leathery leaves

Sea-buckthorn Hippophae rhamnoides showing pale blue glaucous foliage and cross section of single berry.

Salmonberry Rubus spectabilis showing ripe and unripe fruit along with the decorative bright pink blossoms.  Illustration also shows the clear link between this plant and other Rubus species such as Raspberry and Blackberry

Rhododendron ponticum showing pale violet flowers in full bloom, and the smooth and glossy dark green leaves

Purple Dewplant Disphyma crassifolium showing the succulent leaves tinged red, and the purple daisy-like flowers.

Piri Piri bur Acaena novae-zelandiae with individual detail of flower and seed

Virginia creeper Parthenocissus quinquefolia showing suckers, attached suckers, individual flower, and berries