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CCDB → Angiosperms → Compositae → Cirsium → Cirsium proteanum J. T. Howell
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Cirsium proteanum J. T. Howell | Cirsium occidentale var. venustum (Greene) Jeps. | 15II | IPCN online | Strother, J. L. 1983. More chromosome studies in Compositae. Amer. J. Bot. 70(8): 1217–1232. | ||
| ! | Cirsium proteanum J. T. Howell | Cirsium occidentale var. venustum (Greene) Jeps. | 30 | 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. |