Stromanthe thalia
Stuckenia pectinata
Fennel Pondweed
Suaeda maritima
Annual Sea-blite
Succisa pratensis
Devil's-bit Scabious
Swietenia macrophylla
Mahogany
Swietenia macrphylla
Honduran Mahogany
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
Syngonium auritum
Arrowhead Vine
Tabernaemontana divaricata
Carnation of India
Tacinga inamoena
Quipá
Tagetes lucida
Mexican Tarragon
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 richardsianum
Taraxacum Section Erythrosperma
Dandelion
Taraxacum Section Hamata
Dandelion
Taraxacum Section Ruderalia
Dandelion
Taraxacum subnaevosum
Targionia hypophylla
Orobus-seed Liverwort
Taxus baccata
Yew
Teesdalia nudicaulis
Shepherd's Cress
Tellima grandiflora
Fringecups
Tephroseris integrifolia
South Stack Fleawort
Terminalia bentzoe
Bois Benjoin
Terminalia mantaly
Madagascar Almond
Teucrium chamaedrys
Wall Germander
Teucrium scorodonia
Wood Sage
Thalictrum flavum
Common Meadow-rue
Thalictrum minus
Lesser Meadow-rue
Thamnobryum alopecurum
Fox-tail Feather-moss
Thelypteris dentata
Downy Maiden Fern
Thelypteris palustris
Marsh Fern
Thlaspi arvense
Field Penny-cress
Thunbergia mysorensis
Mysore Trumpetvine
Thymus drucei
Wild Thyme
Thysanolaena latifolia
Tiger Grass
Tilia cordata
Small-leaved Lime
Tilia platyphyllos
Large-leaved Lime
Tofieldia pusilla
Scottish Asphodel
Tolypella glomerata
Clustered Stonewort
Torenia crustacea
Malaysian False Pimpernel
Torilis japonica
Upright Hedge-parsley
Torilis nodosa
Knotted Hedge-parsley
Tradescantia spathacea
Oyster Plant
Tragopogon pratensis
Goat's-beard
Trichomanes speciosum
Killarney Fern
Trichophorum germanicum
Deergrass
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
Trifolium pratense
Red Clover
Trifolium scabrum
Rough Clover
Triglochin maritima
Sea Arrowgrass
Triglochin palustris
Marsh Arrowgrass