Salvia verbenaca
Wild Clary
Samanea saman
Raintree
Sambucus canadensis
American Elderberry
Sambucus ebulus
Dwarf Elder
Sambucus nigra
Elder
Samolus valerandi
Brookweed
Sanguisorba officinalis
Great Burnet
Sanicula europaea
Sanicle
Saponaria officinalis
Soapwort
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 rosacea
Irish 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
Schedonorus giganteus
Giant Fescue
Schoenoplectus tabernaemontani
Grey Club-rush