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CCDB → Angiosperms → Compositae → Cirsium → Cirsium douglasii var. breweri (A. Gray) D. J. Keil & C. E. Turner
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Cirsium douglasii var. canescens (Petr.) J. T. Howell | Cirsium douglasii var. breweri (A. Gray) D. J. Keil & C. E. Turner | 30, 34(1, 1) | Asteracea | Ownbey et al. 1975 Brittonia | ||
| ! | Cirsium douglasii var. canescens (Petr.) J. T. Howell | Cirsium douglasii var. breweri (A. Gray) D. J. Keil & C. E. Turner | 30,34 | 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. | ||
| ! | Cirsium douglasii var. breweri (A. Gray) D. J. Keil & C. E. Turner | Cirsium douglasii var. breweri (A. Gray) D. J. Keil & C. E. Turner | 30 | eFlora |