| Hymenoxys acaulis (Pursh) K.F.Parker | Tetraneuris acaulis (Pursh) Greene trib. Helenieae |
| Hymenoxys acaulis ivesiana (Greene) K.F.Parker | Tetraneuris ivesiana Greene trib. Helenieae |
| Hymenoxys argentea (A.Gray) K.F.Parker | Tetraneuris argentea (A.Gray) Greene trib. Helenieae |
| Hymenoxys argentea ivesiana (Greene) Cronquist | Tetraneuris ivesiana Greene trib. Helenieae |
| Hymenoxys biennis (A.Gray) H.M.Hall | Hymenoxys richardsonii (Hook.) Cockerell trib. Helenieae |
| Hymenoxys herbacea (Greene) Cronquist | Tetraneuris herbacea Greene trib. Helenieae |
| Hymenoxys ivesiana (Greene) K.F.Parker | Tetraneuris ivesiana Greene trib. Helenieae |
| Hymenoxys lemmonii greenei Cockerell | Hymenoxys lemmonii (Greene) Cockerell trib. Helenieae |
| Hymenoxys scaposa (DC.) K.F.Parker | Tetraneuris scaposa (DC.) Greene trib. Helenieae |
| Hymenoxys torreyana (Nutt.) K.F.Parker | Tetraneuris torreyana (Nutt.) Greene trib. Helenieae |