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CCDB → Angiosperms → Compositae → Helianthus → Helianthus longifolius Hook.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Helianthus longifolius Hook. | Helianthus longifolius Hook. | 17(1) | Asteracea | Smith D. M. & M. 1959 Rhodora | ||
| ! | Helianthus longifolius Hook. | Helianthus longifolius Hook. | 1IV+15II, 17II(1) | Asteracea | Smith D. M. & M. 1959 Rhodora | ||
| ! | Helianthus longifolius Hook. | Helianthus longifolius Hook. | 17(3) | Asteracea | Heiser 1965 Ann. Missouri Bot. Gard. | ||
| ! | Helianthus longifolius Hook. | Helianthus longifolius Hook. | 17 | Cave1959 | Smith & Martin 1959 |