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CCDB → Angiosperms → Compositae → Senecio → Senecio douglasii (E. de Candolle) DC.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Senecio douglasii (E. de Candolle) DC. | Senecio flaccidus var. douglasii (DC.) B. L. Turner & T. M. Barkley | 20 | 40 | IPCN online | Keil, D. J. 1981. In Chromosome number reports LXXII. Taxon 30: 705–706. | |
| ! | Senecio douglasii (E. de Candolle) DC. | Senecio flaccidus var. douglasii (DC.) B. L. Turner & T. M. Barkley | 40 | IPCN online | Kovanda, M. 1978. Chromosome numbers of miscellaneous United States l: Dicotyledons. Rhodora 80: 431–440. | ||
| ! | Senecio douglasii (E. de Candolle) DC. | Senecio flaccidus var. douglasii (DC.) B. L. Turner & T. M. Barkley | 20 | IPCN67-71 | ORNDUFF, R., T. MOSQUIN, D. W. KYHOS, & P. H. RAVEN. 1967. Chromosome numbers in Compositae. VI. Senecioneae. II. Am. Jour. Bot. 54: 205-213. | ||
| ! | Senecio douglasii (E. de Candolle) DC. | Senecio flaccidus var. douglasii (DC.) B. L. Turner & T. M. Barkley | 20 | Cave1963 | Ornduff et al. 1963 |