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CCDB → Angiosperms → Rosaceae → Sorbus → Sorbus occidentalis (S. Watson) Greene
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Sorbus sitchensis var. grayi (Wenz.) C. L. Hitchc. | Sorbus occidentalis (S. Watson) Greene | 17 | IPCN online | Chambers, K. L., D. Green, S. Potampa & L. McMahan. 1998. IOPB chromosome data 13. Newslett. Int. Organ. Pl. Biosyst. (Oslo) 29: 18–22. | ||
| ! | Sorbus sitchensis subsp. grayi (Wenz.) Calder & R. L. Taylor | Sorbus occidentalis (S. Watson) Greene | c.34 | IPCN67-71 | TAYLOR, R.L., & G.A. MULLIGAN. 1968. Flora of the Queen Charlotte Islands. Part 2. Cytological aspects of the Vascular Plants. Queen's Printer, Ottawa. pp. 148. |