flowers

Silver Birch Betula pendula twig with buds and catkins and leaf

Spiked Water Milfoil Myriophyllum spicatum pencil drawing showing the plant below and above the water

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

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

Skunk Cabbage Lysichiton americanus pencil drawing

Slender St Johns Wort Hypericum pulchrum

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

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

Scots pine Pinus sylvestris trees in pen and ink from young dapling to mature adult tree

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

Rosebay Willowherb Chamaenerion angustifolium

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

Rosemary Rosmarinus officinalis sprig

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

Rowan Sorbus aucuparia tree sapling tree without leaves, in pen and ink

Rowan Sorbus aucuparia tree ink drawing without leaves

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

Rye grass Lolium perenne and individual spikelet

Rye Secale cereale whole plant and seedhead

Sage Salvia officinalis in flower