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CCDB → Angiosperms → Compositae → Hazardia → Haplopappus squarrosus Hook. & Arn.

4 chromosome counts in Haplopappus squarrosus Hook. & Arn.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Haplopappus squarrosus Hook. & Arn.	Hazardia squarrosa (Hook. & Arn.) Greene	5II		IPCN online	Semple, J. C., J. G. Chmielewski & M. E. Lane. 1989. Chromosome number determinations in fam. Compositae, tribe Astereae. III. Additional counts and comments on generic limits and ancestral base numbers. Rhodora 91: 296–314.
		Haplopappus squarrosus Hook. & Arn.	Hazardia squarrosa (Hook. & Arn.) Greene		10	IPCN online	Semple, J. C., J. G. Chmielewski & C. Xiang. 1992. Chromosome number determinations in fam. Compositae, tribe Astereae. IV. Additional reports and comments on the cytogeography and status of some species of Aster and Solidago. Rhodora 94: 48–62.
!		Haplopappus squarrosus Hook. & Arn.	Hazardia squarrosa (Hook. & Arn.) Greene		10	Fedorov, 1974	Raven ct a!. 1960
!		Haplopappus squarrosus Hook. & Arn.	Hazardia squarrosa (Hook. & Arn.) Greene		10	Fedorov, 1974	DeJong, Montgomery 1963