Scrophularia nodosa
Common Figwort
Scutellaria galericulata
Skullcap
Scutellaria incarnata
Hoary Skullcap
Scutellaria minor
Lesser Skullcap
Sedum acre
Biting Stonecrop
Sedum album
White Stonecrop
Sedum anglicum
English Stonecrop
Seemannia sylvatica
Bolivian Sunset
Senecio inaequidens
Narrow-leaved Ragwort
Senecio sarracenicus
Broad-leaved Ragwort
Senecio squalidus
Oxford Ragwort
Senecio sylvaticus
Heath Groundsel
Senecio viscosus
Sticky Groundsel
Senecio vulgaris
Groundsel
Senega paniculata
Root Beer Plant
Senna fistula
Golden Shower Tree
Serratula tinctoria
Saw-wort
Seseli libanotis
Moon Carrot
Setaria verticillata
Hooked Bristlegrass
Sherardia arvensis
Field Madder
Sibthorpia europaea
Cornish Moneywort
Sicyos edulis
Chayote
Silaum silaus
Pepper-saxifrage
Silene conica
Sand Catchfly