watercolour

St Johns Wort Hypericum with very pale leaves, rooting nodes, and buds as well as flowers

Silver birch Betula pendula trees vignette

Silver Birch Betula pendula twig with buds and catkins and leaf

Silver Birch Betula pendula tree shape without leaves, close up of bark, and sprig with leaves and catkins

Slender St Johns Wort Hypericum pulchrum

Slender St Johns Wort Hypericum pulchrum showing red basal leaves and details of the calyx

Rye Secale cereale whole plant and seedhead

Sage Salvia officinalis in flower

Salad burnett Sanguisorba minor with detail of individual male and female flowers

Sanicle Sanicula europea with flower detail and seeds shown on the plant as well as flowers

Scots pine Pinus sylvestris tuft with mature cone and green cones

Seaside centuary Centaurium littorale growing on a dune

Sharp Flowered Rush Juncus acutiflorus with fruit and cross section of stem to show pith detail

sheeps fescue festuca ovina with spikelet, lemma and ligule detail

Sheeps sorrel Rumex acetosella whole plant with flowers

Shining cranesbill Geranium lucidum with scarlet leaves, flowers, and seedheds

Silver birch Betula pendula bark study with a small layer of bark curling off the tree

Rosebay Willowherb Chamaenerion angustifolium

Rosemary Rosmarinus officinalis sprig

Rowan Sorbus aucuparia sprig of leaves, clutch of orange berries and white flowers

Rye grass Lolium perenne and individual spikelet

Purple ramping fumitory Fumaria purpurea with fruit and bud

Pyramidal orchid Anacamptis pyramidalis

Ragged robin Lychnis flos cuculi with flowers, buds and leaves