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CCDB → Angiosperms → Boraginaceae → Symphytum → Symphytum peregrinum Ledeb.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 40 | IPCN online | Wang, G., Z. Li & Q. Meng. 1983. An observation of chromosome numbers of Comfrey from different sources. Acta Phytotax. Sin. 21: 55–59. | |||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 45, 65 | IPCN online | SHIRATO, K., T. Shintani, G. Nakanishi & A. Kamizy;afo. 1985. Chromosome numbers in genus Symphytum. Chromosome Inf. Serv. 38: 21–23. | |||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 40 | IPCN online | Huizing, H. J. 1985. Phytochemistry, systematics and biogenesis of pyrrolizidine alkaloids of Symphytum taxa. Thesis, Meppel. ý. | |||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 40 | IPCN online | Gadella, T. W., E. KLIPHUIS & H. J. Huizing. 1983. Cyto- and chemotaxonomical studies on the sections Officinalia and Coerulea of the genus Symphytum. Bot. Helv. 93: 169–192. | |||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 36 | IPCN online | Probatova. 2006. Chromosome numbers of plants of the Primorsky Territory, the Amur River basin and Magadan region. Bot. Žhurn. (Moscow & Leningrad) 91(3): 491–509. | |||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 40 | IPCN72 | GVINIASHVILI, TS. N. 1972. Some data on the karyology of Caucasic species of Symphytum L. with respect to their taxonomy. (In Russian). Bot. Zurn. 57: 1120-1126. | |||
| ! | Symphytum peregrinum Ledeb. | Symphytum officinale L. | 36 | Darlington, 1955 | Maude 1939 | ||
| Symphytum peregrinum Ledeb. | Symphytum officinale L. | 40 | IAPT/IOPB | IAPT/IOPB Chromosome Data 19 |