Tria - Tryp
- Triadenum fraseri (Spach) Gleason
- Triadenum fraseri (Spach) Gleason
- Triadenum longifolium Small
- Triadenum petiolatum (Walter) Britton
- Triadenum petiolatum (Walter) Britton
- Triadenum Raf.
- Triadenum tubulosum (Walter) Gleason
- Triadenum tubulosum (Walter) Gleason
- Triadenum tubulosum (Walter) Gleason var. walteri (J.G. Gmel.) Cooperr.
- Triadenum tubulosum (Walter) Gleason var. walteri (J.G. Gmel.) Cooperr.
- Triadenum tubulosum (Walter) Gleason var. walteri (J.G. Gmel.) Cooperr.
- Triadenum tubulosum (Walter) Gleason var. walteri (J.G. Gmel.) Cooperr.
- Triadenum virginicum (L.) Raf.
- Triadenum virginicum (L.) Raf.
- Triadenum virginicum (L.) Raf. ssp. fraseri (Spach) J.M. Gillett
- Triadenum virginicum (L.) Raf. ssp. fraseri (Spach) J.M. Gillett
- Triadenum virginicum (L.) Raf. ssp. fraseri (Spach) J.M. Gillett
- Triadenum virginicum (L.) Raf. ssp. fraseri (Spach) J.M. Gillett
- Triadenum virginicum (L.) Raf. var. fraseri (Spach) Cooperr.
- Triadenum virginicum (L.) Raf. var. fraseri (Spach) Cooperr.
- Triadenum virginicum (L.) Raf. var. fraseri (Spach) Cooperr.
- Triadenum virginicum (L.) Raf. var. fraseri (Spach) Cooperr.
- Triadenum walteri (J.G. Gmel.) Gleason
- Triadenum walteri (J.G. Gmel.) Gleason
- Triadica Loureiro
- Triadica sebifera (L.) Small
- Triadica sebifera (L.) Small
- Triantha (Nutt.) Baker
- Triantha (Nutt.) Baker
- Triantha glutinosa (Michx.) Baker
- Triantha glutinosa (Michx.) Baker
- Triantha occidentalis (S. Watson) Gates
- Triantha occidentalis (S. Watson) Gates
- Triantha occidentalis (S. Watson) Gates ssp. brevistyla (C.L. Hitchc.) Packer
- Triantha occidentalis (S. Watson) Gates ssp. brevistyla (C.L. Hitchc.) Packer
- Triantha occidentalis (S. Watson) Gates ssp. brevistyla (C.L. Hitchc.) Packer
- Triantha occidentalis (S. Watson) Gates ssp. brevistyla (C.L. Hitchc.) Packer
- Triantha occidentalis (S. Watson) Gates ssp. montana (C.L. Hitchc.) Packer
- Triantha occidentalis (S. Watson) Gates ssp. montana (C.L. Hitchc.) Packer
- Triantha occidentalis (S. Watson) Gates ssp. montana (C.L. Hitchc.) Packer
