Symphyotrichum lanceolatum
Narrow-leaved Michaelmas-daisy
Symphytum asperum
Rough Comfrey
Symphytum officinale
Common Comfrey
Symphytum orientale
White Comfrey
Symphytum x hidcotense
Hidcote Comfrey
Symphytum x uplandicum
Russian Comfrey
Synedrella nodiflora
Nodeweed
Tabernaemontana alternifolia
East Indian Rosebay
Tabernaemontana divaricata
Carnation of India
Tagetes lucida
Mexican Tarragon
Talinum paniculatum
Fameflower
Tamarix gallica
Tamarisk
Tamus communis
Black Bryony
Tanacetum parthenium
Feverfew
Tanacetum vulgare
Tansy
Taraxacum agg.
Taraxacum britannicum
Taraxacum falcatum
Dandelion
Taraxacum 'iscanum'
Taraxacum palustre
Taraxacum porteri
Taraxacum Section Erythrosperma
Dandelion
Taraxacum Section Hamata
Dandelion
Taraxacum Section Ruderalia
Dandelion
Taraxacum subnaevosum
Taxus baccata
Yew
Teesdalia nudicaulis
Shepherd's Cress
Tellima grandiflora
Fringecups
Tephroseris integrifolia
South Stack Fleawort
Tephrosia noctiflora
Teucrium chamaedrys
Wall Germander
Teucrium scorodonia
Wood Sage
Thalictrum aquilegiifolium
French Meadow-rue
Thalictrum flavum
Common Meadow-rue
Thalictrum minus
Lesser Meadow-rue
Thesium humifusum
Bastard-toadflax
Thunbergia grandiflora
Blue Skyflower
Thunbergia mysorensis
Mysore Trumpetvine
Thymus drucei
Wild Thyme
Thymus pulegioides
Large Garden
Tilia cordata
Small-leaved Lime
Tithonia diversifolia
Tree Marigold
Tithonia rotundifolia
Red Sunflower
Tofieldia pusilla
Scottish Asphodel
Torenia crustacea
Malaysian False Pimpernel
Torilis japonica
Upright Hedge-parsley
Torilis nodosa
Knotted Hedge-parsley
Trachycarpus fortunei
Chusan Palm
Tradescantia pallida
Purple Heart
Tragopogon porrifolius
Salsify
Tragopogon pratensis
Goat's-beard
Trichophorum germanicum
Deergrass
Tridax procumbens
Coatbuttons
Trifolium arvense
Hare's-foot Clover
Trifolium campestre
Hop Trefoil
Trifolium dubium
Lesser Trefoil
Trifolium fragiferum
Strawberry Clover
Trifolium hybridum
Alsike Clover
Trifolium medium
Zigzag Clover
Trifolium micranthum
Slender Trefoil
Trifolium ochroleucon
Sulphur Clover
Trifolium pratense
Red Clover
Trifolium repens
White Clover
Trifolium scabrum
Rough Clover
Triglochin maritima
Sea Arrowgrass
Triglochin palustris
Marsh Arrowgrass
Trimezia coerulea
Walking Iris
Trimezia martinicensis
Yellow Walking Iris
Trinia glauca
Honewort
Tripleurospermum inodorum
Scentless Mayweed