Apium divaricatum (Walter) Alph.Wood species synonym

Leptocaulis patens Nutt. ex DC. species synonym

Leptocaulis inermis Nutt. ex DC. species synonym

Leptocaulis echinatus Nutt. ex DC. species synonym

Leptocaulis divaricatus (Walter) DC. species synonym

Leptocaulis diffusus Nutt. ex DC. species synonym

Babiron divaricatum (Walter) Raf. species synonym

Babiron dichotomum Raf. species synonym

Ammoselinum occidentale Munz & I.M.Johnst. species synonym

Ammi divaricatum (Walter) Pers. species synonym

Ligusticum pusillum (Michx.) Pers. species synonym

Sison pusillum Michx. species synonym

Sison divaricatum (Walter) Spreng. species synonym

Daucus divaricatus Walter species synonym

Sium pusillum Poir. species heterotypic synonym

Spermolepis gigantea (J.M.Coult. & Rose) G.L.Nesom species accepted

Ammi divaricatum Michx. species synonym

Spermolepis divaricata (Walter) Raf. species synonym

Spermolepis inermis (Nutt. ex DC.) Mathias & Constance species accepted

Spermolepis patens (Nutt. ex DC.) B.L.Rob. species synonym

Spermolepis hawaiiensis H.Wolff species accepted

Spermolepis echinata (Nutt.) A.Heller species accepted

Spermolepis infernensis G.L.Nesom species accepted

Spermolepis lateriflora G.L.Nesom species accepted

Aethusa divaricata (Walter) Spreng. species synonym

Apium patens (Nutt. ex DC.) S.Watson species synonym

Spermolepis castellanosii Pérez-Mor. species accepted

Apium echinatum (Nutt.) Benth. & Hook. ex S.Watson species synonym

Apium divaricatum (Walter) Benth. & Hook.fil. ex S.Watson species synonym

Apiastrum patens (Nutt. ex DC.) J.M.Coult. & Rose species synonym

Ammoselinum giganteum J.M.Coult. & Rose species synonym

Spermolepis diffusa (Nutt. ex DC.) G.L.Nesom species accepted

Spermolepis laevis G.L.Nesom species accepted

Leptocaulis echinatus Nutt. species homotypic synonym

Spermolepis divaricata (Walter) Britton species accepted

Spermolepis organensis G.L.Nesom species accepted

Spermolepis divaricata (Benth. & Hook.f. ex S.Watson) Raf. ex Ser. species synonym

Leptocaulis diffusus Nutt. species homotypic synonym

Spermolepis echinatus (Nutt.) F.Heller species accepted

Apium echinatum (Nutt.) Benth. & Hook. species homotypic synonym

Leptocaulis patens Nutt. species homotypic synonym

Apium divaricatum (Walter) Benth. & Hook.fil. species homotypic synonym

Spermolepis patens var. inermis (Nutt. ex DC.) Mathias variety synonym

Leptocaulis inermis Nutt. species homotypic synonym