perennial

Sweet woodruff Asperula odorata with cross section of stem and seeds and flowers on the plant

Tall fescue Festuca arundinaceae with ligule spikelet and lemma details

Toothwort Lathrea squamaria flower with lack of chlorophyll explaining its parasitic life style

Tor grass Brachypodium pinnatum with ligule, spikelet, and lemma detail

Tormentil Potentilla erecta plant showing both shapes of leaves

True fox sedge Carex vulpina tussock

Tubular water dropwort Oenanthe fistulosa in amongst grasses with flowering head and seed head, and showing the stem swelling as well as leaves

Slender St Johns Wort Hypericum pulchrum

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

Small scabious Scabiosa columbaria with flower detail and showing vegetative growth along a stolon

Sneezewort Achillea ptarmica plant

Snowdrop Galanthus nivalis pencil drawing

Snowdrop Galanthus nivalis with one flower

Soft rush Juncus effusus pecil drawing

Southern Marsh Orchid Dactylorhiza praetermissa

Rosebay Willowherb Chamaenerion angustifolium

Rye grass Lolium perenne and individual spikelet

Sage Salvia officinalis in flower

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

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

Purple Loosestrife Lythrum salicaria pencil drawing

Purple Loosestrife Lythrum salicaria with three flowering spikes