Rumex rupestris
Shore Dock
Rumex sanguineus
Wood Dock
Rumex scutatus
French Sorrel
Ruppia maritima
Beaked Tasselweed
Ruscus aculeatus
Butcher's-broom
Russelia equisetiformis
Firecracker Plant
Sabulina verna
Spring Sandwort
Sagina apetala
Annual Pearlwort
Sagina filicaulis
Slender Pearlwort
Sagina nodosa
Knotted Pearlwort
Sagina procumbens
Procumbent Pearlwort
Sagittaria sagittifolia
Arrowhead
Salicornia dolichostachya
Long-spiked Glasswort
Salicornia emerici
Shiny Glasswort
Salicornia europaea
Common Glasswort
Salicornia fragilis
Yellow Glasswort
Salicornia ramosissima
Purple Glasswort
Salix alba
White Willow
Salix aurita
Eared Willow
Salix caprea
Goat Willow
Salix cinerea
Grey Willow
Salix herbacea
Dwarf Willow
Salix pentandra
Bay Willow
Salix purpurea
Purple Willow
Salix repens
Creeping Willow
Salix viminalis
Osier
Salix x fragilis
Crack-willow
Salix x meyeriana
Shiny-leaved Willow
Salpichroa origanifolia
Cock's-eggs
Salsola kali
Prickly Saltwort
Salvia elegans
Pineapple sage
Salvia farinacea
Mealy Sage
Salvia hispanica
Golden Chia
Salvia involucrata
Rosy-leaf sage
Salvia leucanthe
Mexican Bush Sage
Salvia microphylla
Blackcurrant Sage
Salvia officinalis
Sage
Salvia pratensis
Meadow Clary
Salvia splendens
Bonfire Salvia
Salvia verbenaca
Wild Clary
Samanea saman
Raintree
Sambucus canadensis
American Elderberry
Sambucus ebulus
Dwarf Elder
Sambucus nigra
Elder
Samolus valerandi
Brookweed
Sanchezia oblonga
Zebra Plant
Sandoricum koetjape
Santol
Sanguisorba officinalis
Great Burnet
Sanicula europaea
Sanicle
Saponaria officinalis
Soapwort
Saraca indica
Asoka Tree
Satureja montana
Winter Savory
Saxifraga
Garden Saxifrage
Saxifraga aizoides
Yellow Saxifrage
Saxifraga cernua
Drooping Saxifrage
Saxifraga cespitosa
Tufted Saxifrage
Saxifraga granulata
Meadow Saxifrage
Saxifraga hirsuta
Kidney Saxifrage
Saxifraga hypnoides
Mossy Saxifrage
Saxifraga oppositifolia
Purple Saxifrage
Saxifraga paniculata
Livelong Saxifrage
Saxifraga rosacea
Irish Saxifrage
Saxifraga rotundifolia
Round-leaved Saxifrage
Saxifraga spathularis
St Patrick's-cabbage
Saxifraga tridactylites
Rue-leaved Saxifrage
Saxifraga umbrosa
Pyrenean Saxifrage
Saxifraga x polita
False Londonpride
Scabiosa columbaria
Small Scabious
Schaueria calytricha
Golden Plume
Scheuchzeria palustris
Rannoch-rush