CCDB is a community resource. If you are aware of any missing data or if any of the counts are erroneous please submit it to the forms submit new counts, or report erroneous counts.
CCDB → Angiosperms → Compositae → Helianthus → Helianthus praecox subsp. praecox
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Helianthus praecox subsp. praecox | Helianthus praecox Engelm. & A. Gray | 34(1) | Asteracea | Vanzela et al. 2002 Genetica | |||
| Helianthus praecox subsp. praecox | Helianthus praecox Engelm. & A. Gray | 17(1) | Asteracea | Chandler et al. 1986 Syst. Bot. | |||
| Helianthus praecox subsp. praecox | Helianthus praecox Engelm. & A. Gray | 34 | eFlora | ||||
| ! | Helianthus praecox subsp. praecox | Helianthus praecox Engelm. & A. Gray | 34 | C-values database | Sims LE, Price HJ. 1985. Nuclear DNA content variation in Helianthus (Asteraceae). American Journal of Botany 72: 1213-1219. |