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CCDB → Angiosperms → Compositae → Helianthus → Helianthus pauciflorus subsp. subrhomboideus (Rydb.) O. Spring & E. E. Schill.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Helianthus subrhomboideus Rydb. | Helianthus pauciflorus subsp. subrhomboideus (Rydb.) O. Spring & E. E. Schill. | 51(2) | Asteracea | Clevenger & H. 1963 Rhodora | |||
| Helianthus rigidus subsp. subrhomboideus (Rydb.) Heiser | Helianthus pauciflorus subsp. subrhomboideus (Rydb.) O. Spring & E. E. Schill. | 102(1) | Asteracea | Uhrikova ＆ F. 1978 Taxon | |||
| ! | Helianthus subrhomboideus Rydb. | Helianthus pauciflorus subsp. subrhomboideus (Rydb.) O. Spring & E. E. Schill. | 51 | Cave1963 | Clev. & Heiser 1963 |