Saxifraga tridactylites
Rue-leaved Saxifrage
Scabiosa columbaria
Small Scabious
Schoenoplectus tabernaemontani
Grey Club-rush
Schoenus nigricans
Black Bog-rush
Scilla autumnalis
Autumn Squill
Scilla verna
Spring Squill
Scleranthus annuus
Annual Knawel
Scleranthus perennis
Perennial Knawel
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Scutellaria galericulata
Skullcap
Scutellaria minor
Lesser Skullcap
Scutellinia scutellata
Eyelash Cup
Sedum acre
Biting Stonecrop
Sedum album
White Stonecrop
Sedum anglicum
English Stonecrop
Sedum forsterianum
Rock Stonecrop
Sedum rosea
Roseroot
Sedum rupestre
Reflexed Stonecrop
Sedum sexangulare
Tasteless Stonecrop
Sedum telephium
Orpine
Selaginella selaginoides
Lesser Clubmoss
Selenia tetralunaria
Purple Thorn Moth
Senecio aquaticus
Marsh Ragwort