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CCDB → Angiosperms → Compositae → Cirsium → Cirsium nigriceps Standl. & Steyerm.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Cirsium nigriceps Standl. & Steyerm. | Cirsium nigriceps Standl. & Steyerm. | 36(1) | Asteracea | Ownbey et al. 1975 Brittonia | ||
| Cirsium nigriceps Standl. & Steyerm. | Cirsium nigriceps Standl. & Steyerm. | 36 | IPCN online | Ownbey, G. B., P. H. Raven & D. W. Kyhos. 1975 [1976]. Chromosome numbers in some North American species of the genus Cirsium. III. Western United States, Mexico, and Guatemala. Brittonia 27(4): 297–304. |