Stellaria graminea
Lesser Stitchwort
Stellaria holostea
Greater Stitchwort
Stellaria neglecta
Greater Chickweed
Sternbergia lutea
Winter Daffodil
Stropharia semiglobata
Dung Roundhead
Suaeda maritima
Annual Sea-blite
Succisa pratensis
Devil's-bit Scabious
Symphoricarpos albus
Snowberry
Symphyotrichum lanceolatum
Narrow-leaved Michaelmas-daisy
Symphytum officinale
Common Comfrey
Symphytum tuberosum
Tuberous Comfrey
Symphytum x hidcotense
Hidcote Comfrey
Symphytum x uplandicum
Russian Comfrey
Talinum paniculatum
Fameflower
Tamarix gallica
Tamarisk
Tamus communis
Black Bryony
Tanacetum parthenium
Feverfew
Tanacetum vulgare
Tansy
Taraxacum falcatum
Dandelion
Taraxacum 'iscanum'
Taraxacum porteri
Taxus baccata
Yew
Teesdalia nudicaulis
Shepherd's Cress
Tellima grandiflora
Fringecups
Tephroseris integrifolia
South Stack Fleawort
Teucrium scorodonia
Wood Sage
Thalictrum flavum
Common Meadow-rue
Thalictrum minus
Lesser Meadow-rue
Thymus drucei
Wild Thyme
Thysanolaena latifolia
Tiger Grass
Tipula maxima
Giant Cranefly
Tofieldia pusilla
Scottish Asphodel
Torenia crustacea
Malaysian False Pimpernel
Torilis japonica
Upright Hedge-parsley
Torilis nodosa
Knotted Hedge-parsley
Tragopogon porrifolius
Salsify
Tragopogon pratensis
Goat's-beard
Trametes versicolor
Turkey Tails
Tremella mesenterica
Yellow Brain Fungus
Trichoglossum hirsutum
Hairy Earthtongue
Trichomanes speciosum
Killarney Fern
Tridax procumbens
Coatbuttons
Trifolium arvense
Hare's-foot Clover
Trifolium campestre
Hop Trefoil
Trifolium dubium
Lesser Trefoil
Trifolium hybridum
Alsike Clover
Trifolium medium
Zigzag Clover
Trifolium micranthum
Slender Trefoil
Trifolium ochroleucon
Sulphur Clover
Triglochin maritima
Sea Arrowgrass
Triglochin palustris
Marsh Arrowgrass
Trinia glauca
Honewort
Tripolium pannonicum
Sea Aster
Trocdaris verticillata
Whorled Caraway
Trollius europaeus
Globeflower
Tuberaria guttata
Spotted Rock-rose
Tulipa
Tulips
Turnera ulmifolia
Ramgoat Dashalong
Tussilago farfara
Colt's-foot
Typha latifolia
Bulrush
Tyria jacobaeae
Cinnabar Moth (caterpillar)
Ulex europaeus
Gorse
Ulex gallii
Western Gorse
Ulmus glabra
Wych Elm
Ulmus minor
Small-leaved Elm
Umbilicus rupestris
Navelwort
Urtica dioica
Common Nettle
Urtica urens
Small Nettle
Usnea articulata
String-of-sausage lichen
Usnea florida