Tripterygium regelii Sprague & Takeda (Synonym : Tripterygium regelii Sprague & Takeda var. occidentale T.Yamaz.)

Family : Celastraceae

Trisetum spicatum (L.) K.Richt. (Synonym : Aira spicata L.)

Family : Poaceae

Triticum aestivum L. (Synonym : Triticum vulgare Vill.)

Family : Poaceae

Tritonia × crocosmiiflora (Lemoine) G.Nicholson (Synonym : Montbretia × crocosmiiflora Lemoine)

Family : Iridaceae

Triumfetta japonica Makino (Synonym : Triumfetta trichoclada Franch. & Sav.)

Family : Tiliaceae

Trollius ledebourii Rchb. (Synonym : Trollius hondoensis Nakai)

Family : Ranunculaceae

Trollius macropetalus (Regel) F.Schmidt (Synonym : Trollius chinensis Bunge subsp. macropetalus (Regel) Luferov)

Family : Ranunculaceae

Trollius riederianus Fisch. & C.A.Mey. (Synonym : Trollius kurilensis Sipliv.)

Family : Ranunculaceae

Tropaeolum majus L.

Family : Tropaeolaceae

Tsuga ulleungensis G.P.Holman, Del Tredici, Havill, N.S.Lee & C.S.Campb.

Family : Pinaceae