colours

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

Pyramidal orchid Anacamptis pyramidalis

Raceme diagram to show this flowering structure

Ragged robin Lychnis flos cuculi with flowers, buds and leaves

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

Reedmace Typha latifolia rhizome detail with roots and vegetative shoot growing from a rhizome

Proso millet Panicum miliaceum with two seed heads

Remote sedge Carex remota plant with ligule and glume and fruit detail

Purple Loosestrife Lythrum salicaria pencil drawing

Rice Oryza sativa plant

Purple Loosestrife Lythrum salicaria with three flowering spikes