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CCDB → Angiosperms → Betulaceae → Betula → Betula occidentalis Hook.

5 chromosome counts in Betula occidentalis Hook.:

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Median Minimum Max Distribution

		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Betula occidentalis Hook.	Betula occidentalis Hook.		28	IPCN online	Love, A. & D. Love. 1982. In: IOPB chromosome number reports LXXVI. Taxon 31: 583–587.
		Betula fontinalis Sarg.	Betula occidentalis Hook.		28	IPCN66	Dugle 1966
!		Betula papyrifera var. occidentalis (Hook.) Sarg.	Betula occidentalis Hook.		84, c.160	IPCN72	VALANNE, T. 1972. Colchicine effects and colchicine-induced polyploidy in Betula. Ann. Acad. Sci. Fenn. Ser. A. 191: 1-28.
!		Betula occidentalis Hook.	Betula occidentalis Hook.		28	eFlora
!		Betula fontinalis Sarg.	Betula occidentalis Hook.		28	Darlington, 1955	1949