Tall Annual Willowherb          

Tall Blazing Star          

Tall Blue Lettuce          

Tall Buttercup          

Tall Cinquefoil      

Tall Cottongrass      

Tall False Foxglove          

Tall Hairy Agrimony      

Tall Morning-glory          

Tall Thimbleweed          

Tall Thistle          

Tall Tumblemustard          

Tall Wheatgrass      

Tamarisk          

Tansy          

Tansy Cinquefoil          

Tansyaster          

Tansymustard          

Tapered Rosette Grass          

Tapertip Flatsedge      

Taproot Fleabane          

Tarragon          

Tarweed          

Tarweed Fiddleneck      

Tatarian Honeysuckle      

Teal Lovegrass      

Tenpetal Blazingstar      

Tetragonia          

Texas Goldentop          

Texas Toadflax          

Textile Onion      

Thelypody          

Thesium          

Thickspike Wheatgrass          

Thinleaf Cottonsedge          

Thistle          

Thoroughwort          

Threadleaf Crowfoot          

Threadleaf Sedge      

Threeawn          

Threelobe Beggarticks      

Threenerve Fleabane          

Threepetal Bedstraw      

Threetooth Ragwort