| Helianthella argophylla (D.C.Eaton) A.Gray | Enceliopsis argophylla (D.C.Eaton) A.Nelson trib. Heliantheae |
| Helianthella nudicaulis (A.Gray) A.Gray | Enceliopsis nudicaulis (A.Gray) A.Nelson trib. Heliantheae |
| Helianthella argophylla (D.C.Eaton) A.Gray | Enceliopsis argophylla (D.C.Eaton) A.Nelson trib. Heliantheae |
| Helianthella nudicaulis (A.Gray) A.Gray | Enceliopsis nudicaulis (A.Gray) A.Nelson trib. Heliantheae |