Soldanella alpina
Alpine Snowbell
Solidago canadensis
Canadian Goldenrod
Solidago virgaurea
Goldenrod
Sonchus asper
Prickly Sow-thistle
Sorbus aria
Common Whitebeam
Sorbus cambrensis
Welsh Whitebeam
Sorbus leptophylla
Thin-leaved Whitebeam
Sorbus leyana
Ley's Whitebeam
Sorbus minima
Least Whitebeam
Sorbus porrigentiformis
Grey-leaved Whitebeam
Sorbus stenophylla
Llanthony Whitebeam
Sparganium angustifolium
Floating Bur-reed
Spathiphyllum blandum
Pleasant Peace Lily
Spathodea campanulata
African Tulip Tree
Spathoglottis plicata
Philippine Ground Orchid
Spergula arvensis
Corn Spurrey
Spergularia rubra
Sand Spurrey
Spermacoce exilis
False Buttonweed
Spermacoce hispida
Shaggy Buttonweed
Spermacoce remota
Sphagneticola trilobata
Bay Biscayne Creeping-oxeye
Sphagnum denticulatum
Cow-horn Bog-moss
Spigelia anthelmia
West Indian Pinkroot
Stachytarpheta cayennensis
Blue Snakeweed
Stellaria aquatica
Water Chickweed
Stellaria graminea
Lesser Stitchwort
Stellaria holostea
Greater Stitchwort
Stellaria nemorum
Wood Stitchwort
Stigmella anomalella
Stigmella assimilella
Strobilanthes alternata
Red-ivy
Strobilanthes reptans
Waffle Plant
Stromanthe thalia
Stylosanthes guianensis
Stylo
Swietenia macrophylla
Mahogany
Swietenia macrphylla
Honduran Mahogany
Symphytum orientale
White Comfrey
Synedrella nodiflora
Nodeweed
Syngonium auritum
Arrowhead Vine
Syzygium samarangense
Wax Apple
Tabernaemontana alternifolia
East Indian Rosebay
Tabernaemontana divaricata
Carnation of India
Tacinga inamoena
Quipá
Tagetes lucida
Mexican Tarragon
Talinum paniculatum
Fameflower
Tanacetum vulgare
Tansy
Taxus baccata
Yew
Tephrosia noctiflora
Terminalia bentzoe
Bois Benjoin
Terminalia catappa
Malabar almond
Terminalia mantaly
Madagascar Almond
Tetraphis pellucida
Pellucid Four-tooth Moss
Thalictrum minus
Lesser Meadow-rue
Thelypteris dentata
Downy Maiden Fern
Theobroma cacao
Cocoa Tree
Thesium humifusum
Bastard-toadflax
Thunbergia grandiflora
Blue Skyflower
Thunbergia mysorensis
Mysore Trumpetvine
Thymus drucei
Wild Thyme
Thysanolaena latifolia
Tiger Grass
Tithonia diversifolia
Tree Marigold
Tithonia rotundifolia
Red Sunflower
Torenia crustacea
Malaysian False Pimpernel
Tradescantia pallida
Purple Heart
Tradescantia spathacea
Oyster Plant
Tragopogon porrifolius
Salsify
Trametes versicolor
Turkey Tails
Tridax procumbens
Coatbuttons
Trifolium aureum
Large Trefoil
Trifolium hybridum
Alsike Clover