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 → Cirsium → Cirsium rydbergii Petr.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Cirsium rydbergii Petr. | Cirsium rydbergii Petr. | 34(1) | Asteracea | Ownbey ＆ H. 1969 Madrono | ||
| ! | Cirsium rydbergii Petr. | Cirsium rydbergii Petr. | 34 | IPCN67-71 | OWNBEY, G.B., & Y-T. HSI. 1969. Chromosome numbers in some North American species of the genus Cirsium. II. Western United states. Madrono 20: 225-228. | ||
| ! | Cirsium rydbergii Petr. | Cirsium rydbergii Petr. | 34 | eFlora |