Rumex sanguineus
Wood Dock
Sagina filicaulis
Slender Pearlwort
Sagina procumbens
Procumbent Pearlwort
Sagittaria sagittifolia
Arrowhead
Salicornia europaea
Common Glasswort
Salsola kali
Prickly Saltwort
Salvia pratensis
Meadow Clary
Sambucus nigra
Elder
Sanicula europaea
Sanicle
Saxifraga cernua
Drooping Saxifrage
Scheuchzeria palustris
Rannoch-rush
Schoenoplectus tabernaemontani
Grey Club-rush
Scilla autumnalis
Autumn Squill
Scilla verna
Spring Squill
Scirpoides holoschoenus
Round-headed Club-rush
Scorzoneroides autumnalis
Autumn Hawkbit
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Sedum anglicum
English Stonecrop
Senecio sylvaticus
Heath Groundsel
Senecio viscosus
Sticky Groundsel
Senecio vulgaris
Groundsel
Serratula tinctoria
Saw-wort
Silaum silaus
Pepper-saxifrage