| Asteraceae | |
Hymenoclea fasciculata
| A. Nelson | Bot. Gaz. 37(4): 270–271 | 1904 |
| Asteraceae | |
Hymenoclea hemidioica
| A. Nelson | Amer. J. Bot. 25(2): 117 | 1938 |
| Asteraceae | |
Hymenoclea monogyra
| Torr. & A. Gray | Mem. Amer. Acad. Arts, n.s. 4(1): 79–80 | 1849 |
| Asteraceae | |
Hymenoclea pentalepis
| Rydb. | N. Amer. Fl. 33(1): 14 | 1922 |
| Asteraceae | * |
Hymenoclea platyspina
| Seaman | Madroño 23: 111, fig.1 | 1975 |
| Asteraceae | |
Hymenoclea × platyspina
| Seaman | Madroño 23: 111 | 1975 |
| Asteraceae | |
Hymenoclea salsola
| Torr. & A. Gray | Mem. Amer. Acad. Arts, n.s. 4(1): 79 | 1849 |
| Asteraceae | |
Hymenoclea sandersonii
| (Welsh) N.H. Holmgren | Intermount. Fl. 5: 473 | 1994 |