Sedum rosea
Roseroot
Sedum rupestre
Reflexed Stonecrop
Sedum sexangulare
Tasteless Stonecrop
Sedum spurium
Caucasian-stonecrop
Sedum telephium
Orpine
Sempervivum arachnoideum
Cobweb House-leek
Senecio aquaticus
Marsh Ragwort
Senecio inaequidens
Narrow-leaved Ragwort
Senecio jacobaea
Common Ragwort
Senecio sarracenicus
Broad-leaved Ragwort
Senecio squalidus
Oxford Ragwort
Senecio sylvaticus
Heath Groundsel
Senecio vernalis
Eastern Groundsel
Senecio viscosus
Sticky Groundsel
Senecio vulgaris
Groundsel
Serratula tinctoria
Saw-wort
Seseli libanotis
Moon Carrot
Sherardia arvensis
Field Madder
Sibthorpia europaea
Cornish Moneywort
Silaum silaus
Pepper-saxifrage
Silene acaulis
Moss Campion
Silene armeria
Sweet-William Catchfly
Silene chalcedonica
Maltese-Cross
Silene conica
Sand Catchfly