Saxifraga x polita
False Londonpride
Scabiosa columbaria
Small Scabious
Schoenoplectus tabernaemontani
Grey Club-rush
Scilla verna
Spring Squill
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Scrophularia umbrosa
Green Figwort
Scutellaria galericulata
Skullcap
Scutellaria minor
Lesser Skullcap
Sedum forsterianum
Rock Stonecrop
Sedum rosea
Roseroot
Sedum telephium
Orpine
Senecio cambrensis
Welsh Groundsel
Senecio inaequidens
Narrow-leaved Ragwort
Senecio vulgaris
Groundsel
Sequoia sempervirens
Coastal Redwood
Serratula tinctoria
Saw-wort
Sherardia arvensis
Field Madder
Sibthorpia europaea
Cornish Moneywort
Silene conica
Sand Catchfly
Silene dioica
Red Campion
Silene flos-cuculi
Ragged-Robin
Silene latifolia
White Campion
Silene noctiflora
Night-flowering Catchfly