Sinapis arvensis
Charlock
Sisymbrium officinale
Hedge Mustard
Solanum nigrum
Black Nightshade
Sonchus asper
Prickly Sow-thistle
Sonchus oleraceus
Smooth Sow-thistle
Spergula arvensis
Corn Spurrey
Spergularia marina
Lesser Sea-spurrey
Spergularia rubra
Sand Spurrey
Stachys arvensis
Field Woundwort
Stellaria media
Common Chickweed
Stellaria neglecta
Greater Chickweed
Suaeda maritima
Annual Sea-blite
Teesdalia nudicaulis
Shepherd's Cress
Thlaspi arvense
Field Penny-cress
Torilis japonica
Upright Hedge-parsley
Torilis nodosa
Knotted Hedge-parsley
Trifolium arvense
Hare's-foot Clover
Trifolium campestre
Hop Trefoil
Trifolium dubium
Lesser Trefoil
Trifolium micranthum
Slender Trefoil
Trifolium scabrum
Rough Clover
Tripleurospermum inodorum
Scentless Mayweed
Tuberaria guttata
Spotted Rock-rose
Urtica urens
Small Nettle