Scilla verna
Spring Squill
Scirpoides holoschoenus
Round-headed Club-rush
Scorzoneroides autumnalis
Autumn Hawkbit
Scrophularia auriculata
Water Figwort
Scrophularia nodosa
Common Figwort
Sedum anglicum
English Stonecrop
Senecio sylvaticus
Heath Groundsel
Senecio viscosus
Sticky Groundsel
Senecio vulgaris
Groundsel
Serratula tinctoria
Saw-wort
Silaum silaus
Pepper-saxifrage
Silene gallica
Small-flowered Catchfly
Silene noctiflora
Night-flowering Catchfly
Silene viscaria
Sticky Catchfly
Silene vulgaris
Bladder Campion
Sinapis alba
White Mustard
Sinapis arvensis
Charlock
Sisymbrium officinale
Hedge Mustard
Sisyrinchium bermudiana
Blue-eyed-grass
Smyrnium olusatrum
Alexanders
Solanum aethiopicum
Ethiopian Eggplant
Solanum chenopodioides
Tall Nightshade
Solanum dulcamara
Bittersweet
Solanum erianthum
Velvet Nightshade
Solanum nigrum
Black Nightshade
Solanum nitidibaccatum
Green Nightshade
Solidago virgaurea
Goldenrod
Sonchus arvensis
Perennial Sow-thistle
Sorbus aria
Common Whitebeam
Sorbus aucuparia
Rowan
Sorbus cambrensis
Welsh Whitebeam
Sorbus leptophylla
Thin-leaved Whitebeam
Sorbus minima
Least Whitebeam
Sorbus stenophylla
Llanthony Whitebeam
Sparganium erectum
Branched Bur-reed
Sparganium natans
Least Bur-reed
Stachys palustris
Marsh Woundwort
Staphylea pinnata
Bladdernut
Stuckenia pectinata
Fennel Pondweed
Succisa pratensis
Devil's-bit Scabious
Syzygium samarangense
Wax Apple
Talinum paniculatum
Fameflower
Tamus communis
Black Bryony
Taraxacum falcatum
Dandelion
Taraxacum 'iscanum'
Taxus baccata
Yew
Teesdalia nudicaulis
Shepherd's Cress
Theobroma cacao
Cocoa Tree
Thlaspi arvense
Field Penny-cress
Thuja plicata
Western Red-cedar
Tilia x europaea
Lime
Torilis japonica
Upright Hedge-parsley
Torilis nodosa
Knotted Hedge-parsley
Tragopogon porrifolius
Salsify
Tragopogon pratensis
Goat's-beard
Triglochin maritima
Sea Arrowgrass
Triglochin palustris
Marsh Arrowgrass
Trinia glauca
Honewort
Triphasia trifolia
Limeberry
Trocdaris verticillata
Whorled Caraway
Trollius europaeus
Globeflower
Turritis glabra
Tower Mustard
Tussilago farfara
Colt's-foot
Ulmus glabra
Wych Elm
Urtica urens
Small Nettle
Vaccinium myrtillus
Bilberry
Vaccinium oxycoccos
Cranberry
Vaccinium vitis-idaea
Cowberry
Valeriana dioica
Marsh Valerian
Valeriana officinalis
Common Valerian