Sambucus ebulus
Dwarf Elder
Sambucus nigra
Elder
Sanguisorba officinalis
Great Burnet
Sanicula europaea
Sanicle
Saponaria officinalis
Soapwort
Saturnia pavonia
Emperor Moth
Saxifraga granulata
Meadow Saxifrage
Saxifraga hypnoides
Mossy Saxifrage
Saxifraga oppositifolia
Purple Saxifrage
Saxifraga tridactylites
Rue-leaved Saxifrage
Scabiosa columbaria
Small Scabious
Schoenoplectus lacustris
Common Club-rush
Schoenoplectus tabernaemontani
Grey Club-rush
Scilla luciliae
Boissier's Glory-of-the-snow
Scirpus sylvaticus
Wood Club-rush
Scorzoneroides autumnalis
Autumn Hawkbit
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Scutellaria galericulata
Skullcap
Scutellaria minor
Lesser Skullcap
Sedum acre
Biting Stonecrop
Selenia tetralunaria
Purple Thorn Moth
Senecio squalidus
Oxford Ragwort
Senecio viscosus
Sticky Groundsel