Silene viscaria
Sticky Catchfly
Silene vulgaris
Bladder Campion
Sinapis alba
White Mustard
Sisymbrium officinale
Hedge Mustard
Smyrnium perfoliatum
Perfoliate Alexanders
Solanum chenopodioides
Tall Nightshade
Solanum dulcamara
Bittersweet
Solanum melongena
Eggplant
Soleirolia soleirolii
Mind-your-own-business
Solidago canadensis
Canadian Goldenrod
Solidago virgaurea
Goldenrod
Sonchus arvensis
Perennial Sow-thistle
Sonchus asper
Prickly Sow-thistle
Sorbus aria
Common Whitebeam
Sorbus torminalis
Wild Service-tree
Sparganium erectum
Branched Bur-reed
Sparganium natans
Least Bur-reed
Spergula arvensis
Corn Spurrey
Spergularia rubra
Sand Spurrey
Spergularia rupicola
Rock Sea-spurrey
Spiraea x rosalba
Intermediate Bridewort
Spiranthes romanzoffiana
Irish Lady's-tresses
Spiranthes spiralis
Autumn Lady's-tresses
Stachys alpina
Limestone Woundwort
Stachys byzantina
Lamb's-ear
Stachys germanica
Downy Woundwort
Stachys palustris
Marsh Woundwort
Stachytarpheta jamaicensis
Blue Porterweed
Stellaria alsine
Bog Stitchwort
Stellaria aquatica
Water Chickweed
Stellaria neglecta
Greater Chickweed
Succisa pratensis
Devil's-bit Scabious
Symphytum officinale
Common Comfrey
Symphytum orientale
White Comfrey
Symphytum x hidcotense
Hidcote Comfrey
Symphytum x uplandicum
Russian Comfrey
Tamarix gallica
Tamarisk
Taraxacum porteri
Taraxacum Section Erythrosperma
Dandelion
Taraxacum Section Ruderalia
Dandelion
Tellima grandiflora
Fringecups
Tephroseris integrifolia
South Stack Fleawort
Teucrium scorodonia
Wood Sage
Thalictrum flavum
Common Meadow-rue
Tilia cordata
Small-leaved Lime
Tofieldia pusilla
Scottish Asphodel
Torilis nodosa
Knotted Hedge-parsley
Tragopogon porrifolius
Salsify
Tragopogon pratensis
Goat's-beard
Trifolium campestre
Hop Trefoil
Trifolium medium
Zigzag Clover
Trifolium micranthum
Slender Trefoil
Trifolium scabrum
Rough Clover
Triglochin palustris
Marsh Arrowgrass
Triumfetta rhomboidea
Diamond Burbark
Trollius europaeus
Globeflower
Tuberaria guttata
Spotted Rock-rose
Tussilago farfara
Colt's-foot
Typha latifolia
Bulrush
Ulex europaeus
Gorse
Ulmus glabra
Wych Elm
Urena lobata
Caesarweed
Urtica dioica
Common Nettle
Urtica urens
Small Nettle
Utricularia minor
Lesser Bladderwort
Vaccinium myrtillus
Bilberry
Vaccinium oxycoccos
Cranberry
Valeriana dioica
Marsh Valerian
Valerianella locusta
Common Cornsalad
Verbascum nigrum
Dark Mullein