Spathodea campanulata
African Tulip Tree
Spergula arvensis
Corn Spurrey
Spergularia media
Greater Sea-spurrey
Spergularia rubra
Sand Spurrey
Spergularia rupicola
Rock Sea-spurrey
Spermacoce exilis
False Buttonweed
Spermacoce hispida
Shaggy Buttonweed
Spigelia anthelmia
West Indian Pinkroot
Spiraea canescens
Himalayan Spiraea
Spiraea x rosalba
Intermediate Bridewort
Spiranthes spiralis
Autumn Lady's-tresses
Spirodela polyrhiza
Greater Duckweed
Stachys byzantina
Lamb's-ear
Stachys germanica
Downy Woundwort
Stachys palustris
Marsh Woundwort
Stachys sylvatica
Hedge Woundwort
Staphylea pinnata
Bladdernut
Stellaria alsine
Bog Stitchwort
Stellaria aquatica
Water Chickweed
Stellaria neglecta
Greater Chickweed
Strobilanthes alternata
Red-ivy
Stylosanthes guianensis
Stylo
Succisa pratensis
Devil's-bit Scabious
Swietenia macrophylla
Mahogany
Swietenia macrphylla
Honduran Mahogany
Symphyotrichum lanceolatum
Narrow-leaved Michaelmas-daisy
Symphytum officinale
Common Comfrey
Symphytum orientale
White Comfrey
Symphytum x hidcotense
Symphytum x uplandicum
Russian Comfrey
Synedrella nodiflora
Nodeweed
Syngonium auritum
Arrowhead Vine
Syzygium samarangense
Wax Apple
Tabernaemontana alternifolia
East Indian Rosebay
Talinum paniculatum
Fameflower
Tamus communis
Black Bryony
Tanacetum parthenium
Feverfew
Taraxacum falcatum
Dandelion
Taraxacum 'iscanum'
Taraxacum palustre
Taraxacum richardsianum
Taraxacum Section Erythrosperma
Dandelion
Taraxacum Section Hamata
Dandelion
Taraxacum subnaevosum
Taxus baccata
Yew
Teesdalia nudicaulis
Shepherd's Cress
Tellima grandiflora
Fringecups
Tephroseris integrifolia
South Stack Fleawort
Terminalia bentzoe
Bois Benjoin
Terminalia catappa
Malabar almond
Teucrium scorodonia
Wood Sage
Thalictrum flavum
Common Meadow-rue
Thalictrum minus
Lesser Meadow-rue
Theobroma cacao
Cocoa Tree
Thuja plicata
Western Red-cedar
Thunbergia grandiflora
Blue Skyflower
Thymus drucei
Wild Thyme
Thysanolaena latifolia
Tiger Grass
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
Tradescantia pallida
Purple Heart
Tradescantia spathacea
Oyster Plant
Tragopogon pratensis
Goat's-beard
Trichomanes speciosum
Killarney Fern
Trifolium arvense
Hare's-foot Clover