Rhodiola rosea
Roseroot
Rorippa islandica
Northern Yellow-cress
Rorippa palustris
Marsh Yellow-cress
Rorippa sylvestris
Creeping Yellow-cress
Rubia peregrina
Wild Madder
Rumex maritimus
Golden Dock
Salix repens
Creeping Willow
Saxifraga aizoides
Yellow Saxifrage
Sedum acre
Biting Stonecrop
Sedum sexangulare
Tasteless Stonecrop
Senecio cambrensis
Welsh Groundsel
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
Senna fistula
Golden Shower Tree
Sida rhombifolia
Arrowleaf Sida
Sinapis alba
White Mustard
Sinapis arvensis
Charlock
Sisymbrium officinale
Hedge Mustard
Smyrnium olusatrum
Alexanders
Solanum nigrum
Black Nightshade