Rorippa palustris
Marsh Yellow-cress
Rumex maritimus
Golden Dock
Sagina apetala
Annual Pearlwort
Salicornia dolichostachya
Long-spiked Glasswort
Salicornia emerici
Shiny Glasswort
Salicornia europaea
Common Glasswort
Salicornia fragilis
Yellow Glasswort
Salicornia ramosissima
Purple Glasswort
Salsola kali
Prickly Saltwort
Saxifraga tridactylites
Rue-leaved Saxifrage
Scleranthus annuus
Annual Knawel
Secale cereale
Rye
Senecio cambrensis
Welsh Groundsel
Senecio squalidus
Oxford Ragwort
Senecio sylvaticus
Heath Groundsel
Senecio viscosus
Sticky Groundsel
Senecio vulgaris
Groundsel
Setaria viridis
Green Bristle-grass
Sherardia arvensis
Field Madder
Silene conica
Sand Catchfly
Silene gallica
Small-flowered Catchfly
Silene noctiflora
Night-flowering Catchfly
Sinapis alba
White Mustard
Sinapis arvensis
Charlock