Taenidia          

Tall Blazing Star          

Tall Buttercup          

Tall Cinquefoil      

Tall False Foxglove          

Tall Fescue          

Tall Hairy Agrimony      

Tall Horned Beaksedge          

Tall Lespedeza          

Tall Morning-glory          

Tall Oatgrass      

Tall Poppymallow          

Tall Silverbush          

Tall Thimbleweed          

Tall Thistle          

Tall Thoroughwort          

Tall Tickseed          

Tall Tumblemustard          

Tall Wheatgrass      

Tamarisk          

Tanseyleaf Tansyaster      

Tansy          

Tansy Dogshade          

Tansyaster          

Tansymustard          

Tapered Rosette Grass          

Taperleaf Water Horehound      

Tapertip Dodder          

Tapertip Flatsedge      

Tapertip Rush      

Tapertip Wakerobin          

Tarragon          

Tasselflower Brickellbush          

Tatarian Honeysuckle      

Teal Lovegrass      

Teasel          

Tennessee Bladderfern          

Tenpetal Blazingstar      

Tenpetal Thimbleweed          

Terrestrial Water-starwort          

Texan Great Ragweed          

Texan Sugarberry          

Texas Bergia          

Texas Bindweed