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CCDB → Angiosperms → Compositae → Erigeron → Erigeron ursinus D. C. Eaton

4 chromosome counts in Erigeron ursinus D. C. Eaton:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
!		Erigeron ursinus D. C. Eaton	Erigeron ursinus D. C. Eaton		18	IAPT/IOPB	IAPT/IOPB Chromosome Data 11
		Erigeron ursinus D. C. Eaton	Erigeron ursinus D. C. Eaton	9(1)		Asteracea	Solbrig et al. 1969 Amer. J. Bot.
!		Erigeron ursinus D. C. Eaton	Erigeron ursinus D. C. Eaton	9II		IPCN online	Semple, J. C., C. Xiang, J. Zhang, M. Horsburgh & R. Cook. 2001. Chromosme number determinations in Fam. Compositae, tribe Astereae. VI. Western North American taxa and comments on generic treatments of North American asters. Rhodora 103: 202–218.
!		Erigeron ursinus D. C. Eaton	Erigeron ursinus D. C. Eaton	9		IPCN67-71	SOLBRIG, Q.T., L.C. ANDERSON, D.W. KYHOS, & P.H. RAVEN. 1969. Chromosome numbers in Compositae. VIII: Astereae III. Amer. J. Bot. 56: 348-353.