rockpink f. _parviflorum_ Nutt. prairie f. _Tanacetum vulgare_ L. common tansy _Taraxacum_ Zinn dandelion _laevigatum_ (Willd.) DC. (_T. erythrospermum_ Andrz.) smooth d. _officinale_ Weber (_T. vulgare_ Lam.) common d. _Teucrium_ L. germander _canadense_ L. var. _virginicum_ (L.) Eat. American g. _laciniatum_ Torr. cutleaf g. _occidentale_ Gray hairy g. _Thalictrum dasycarpum_ Fisch. & Lall. purple meadowrue _Thaspium_ Nutt. thaspium _barbinode_ (Michx.) Nutt. hairyjoint t. _trifoliatum_ (L.) Gray threeleaf t. _Thelesperma_ Less. greenthread _gracile_ (Torr.) Gray slender g. _trifidum_ (Poir.) Britt. threecleft g. _Thlaspi arvense_ L. pennycress _Tidestromia lanuginosa_ (Nutt.) Standl. woolly tidestromia _Tithymalus_ (see _Euphorbia_) _Tomanthera_ (see _Gerardia_) _Tovara virginiana_ (L.) Raf. (_Polygonum v._ L.) Virginia tovara _Townsendia sericea_ Hook. [_T. exscapa_ (Rich.) Porter] stemless townsendia _Tragia urticifolia_ Michx. (_T. nepetaefolia_ of manuals, not Cav., including _T. ramosa_ of manuals, not Torr.) nettleleaf noseburn _Tragopogon_ L. salsify _dubius_ Scop. (_T. major_ Jacq.) western s. _porrifolius_ L. vegetable-oyster s. _pratensis_ L. meadow s. _Tribulus terrestris_ L. puncturevine _Triosteum_ L. horsegentian _aurantiacum_ Bickn. orange h. _perfoliatum_ L. common h. _Urtica procera_ Muhl. tall nettle _Utricularia vulgaris_ L. common bladderwort _Vaccaria_ (see _Saponaria_) _Valerianella radiata_ (L.) Dufr. cornsalad _Verbascum_ L. mullein _blattaria_ L. moth m. _thapsus_ L. flannel m. _Verbena_ L. verbena _bipinnatifida_ Nutt. Dakota v. _bracteata_ Lag. & Rodr. bigbract v. _canadensis_ (L.) Britt. rose v. _hastata_ L. blue v. _simplex_ Lehm. narrowleaf v. _stricta_ Vent. woolly v. _urticifolia_ L. white v. _Verbesina_ L. crownbeard _alternifolia_ (L.) Britt.