Ammi rubricaule Hornem. species synonym

Ammi costatum Elliott species synonym

Ammi capillaceum Michx. species synonym

Discopleura major (Walter) Britton, Sterns & Poggenb. species synonym

Discopleura juncea (Raf.) Steud. species synonym

Discopleura costata (Elliott) Chapm. species synonym

Discopleura capillacea var. nuttallii (DC.) J.M.Coult. & Rose variety synonym

Discopleura capillacea var. costata (Elliott) A.Gray variety synonym

Peucedanum verticillatum Raf. species synonym

Sison rubricaule (Hornem.) Eaton & Wright species synonym

Sison costatus (Elliott) Eaton species synonym

Ptilimnium missouriense J.M.Coult. & Rose species synonym

Ptilimnium junceum (Raf.) Raf. species synonym

Ptilimnium ahlesii Weakley & G.L.Nesom species accepted

Discopleura capillacea (Michx.) DC. species heterotypic synonym

Cicuta capillacea Nutt. ex DC. species synonym

Ammi junceum Raf. species synonym

Ptilimnium nuttallii (DC.) Britton species accepted

Discopleura nuttallii DC. species synonym

Ptilimnium costatum (Elliott) Raf. species accepted

Ptilimnium capillaceum (Michx.) Raf. ex Ser. species doubtful

Ptilimnium macrospermum Ahles species synonym

Ptilimnium texense J.M.Coult. & Rose species accepted

Ptilimnium capillaceum (Michx.) Raf. species accepted

Ptilimnium macrospermum Kartesz species accepted

Ammi majus Walter species heterotypic synonym

Ptilimnium ×texense (J.M.Coult. & Rose) Easterly species synonym

Ptilimnium capillaceum (Michx.) Hollick species synonym

Discopleura capillacea var. costata (Elliott) DC. variety synonym

Discopleura costata (Elliott) Steud. species synonym

Ptilimnium costatum J.M.Coult. & Rose, 1909 species doubtful

Cicuta capillacea Nutt. species homotypic synonym