| Asteraceae | ! |
Helianthus debilis subsp. cucumerifolius
| (Torr. & A. Gray) Heiser | Madroño 13(5): 160 | 1956 |
| Asteraceae | |
Helianthus debilis var. cucumerifolius
| (Torr. & A. Gray) A. Gray | Proc. Amer. Acad. Arts 18: 106 | 1883 |
| Asteraceae | |
Helianthus debilis subsp. debilis
| | | |
| Asteraceae | |
Helianthus debilis var. debilis
| | | |
| Asteraceae | |
Helianthus debilis subsp. hirtus
| Heiser | Madroño 13(5): 162, f. 7 | 1956 |
| Asteraceae | |
Helianthus debilis subsp. praecox
| (Engelm. & A. Gray) Heiser | Madroño 13(5): 160 | 1956 |
| Asteraceae | |
Helianthus debilis var. purpureus
| | | * |
| Asteraceae | |
Helianthus debilis subsp. runyonii
| Heiser | Madroño 13(5): 161–162, f. 7 | 1956 |
| Asteraceae | |
Helianthus debilis subsp. silvestris
| Heiser | Madroño 13(5): 158–160, f. 6 | 1956 |
| Asteraceae | |
Helianthus debilis var. silvestris
| (Heiser) Cronquist | Brittonia 29(2): 223 | 1977 |
| Asteraceae | |
Helianthus debilis subsp. tardiflorus
| Heiser | Madroño 13(5): 156–158, f. 5–6 | 1956 |
| Asteraceae | |
Helianthus debilis var. tardiflorus
| (Heiser) Cronquist | Brittonia 29(2): 223 | 1977 |
| Asteraceae | |
Helianthus debilis subsp. vestitus
| (E. Watson) Heiser | Madroño 13(5): 154 | 1956 |
| Asteraceae | |
Helianthus debilis var. vestitus
| (E. Watson) Cronquist | Brittonia 29(2): 223 | 1977 |