11 
Stick Tight Tanacetum 
Stickweed Tansy 
Sticky Laurel Mustard 
Stinkgrass Taraxacum 
Stinking Clover Taxaceae 
Stipa Taxus 
Stonecrop Tea, Labrador 
Family Tea-vine 
Strawberry Teasel 
Blite Family 
Streptopus Tellima 
Subularia Thalesia 
Suksdorfia Thalictrum 
Sumac Thelypteris 
Family Thermopsis 
Sundew Therofon 
Family Thimbleberry 
Narrow-leaved Thirst Berry 
Round-leaved Thistle 
Sunflower Bull 
Family Canadian 
Sweet Cicely Indian 
Sweet Flag Turkestan 
Sweet Reedgrass Sow-thistle 
Swertia Yellow-star 
Symphoricarpos Thlaspi 
Synthyris Thuja 
Syringia Thysanocarpus 
