Synonyms
Upopion pinnatum Raf.
Thaspium trifoliatum f. atropurpureum (Nutt.) Farw.
Smyrnium cordatum Walter
Smyrnium atropurpureum Lam.
Thaspium ziziopsis Daniels
Upopion cordatum (Walter) Raf.
Upopion heterophylum Raf.
Carum cordatum (Walter) Alph.Wood
Zizia sylvatica Benke
Thaspium aureum var. involucratum J.M.Coult. & Rose
Thaspium aureum var. cordatum Britton, Sterns & Poggenb.
Thaspium purpureum Walp.
Thaspium atropurpureum Nutt.
Thaspium cordatum var. atropurpureum (Nutt.) Alph.Wood
Thaspium sylvaticum (Benke) G.N.Jones
Thaspium trifoliatum var. atropurpureum (Nutt.) A.Gray
Thaspium aureum var. atropurpureum (Nutt.) J.M.Coult. & Rose
Thaspium aureum var. apterum A.Gray
Zizia parvifolia Raf.