accurate

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 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

Ragwort Senecio jacobaea flowering head and leaves with pale leaf underside shown

Rattan Palm Calamus frond and showing spiked stem, pen and ink

Red campion Silene dioica with buds and hairy stem

Red currant Ribes rubrum showing the shiny red currants and birght green leaves and flowers

Red Dead Nettle Lamium purpureum two flowers with a tangle of small leaves at their base

Reed canary grass Phalaris arundinacea pencil drawing of the spike

Reed Phragmites australis

Primrose Primula vulgaris