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CCDB → Angiosperms → Compositae → Pyrrhopappus → Pyrrhopappus rothrockii A. Gray

8 chromosome counts in Pyrrhopappus rothrockii A. Gray:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray	6(3)		Asteracea	Tomb et al. 1978 Amer. J. Bot.
		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray	6II+1s		IPCN online	Freeman, C. C. & R. E. Brooks. 1988. Documented plant chromosome numbers 1988: 1. Chromosome counts for North American plants -- I. Sida 13: 241–250.
		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray	6		IPCN online	Keil, D. J. 1981. In Chromosome number reports LXXII. Taxon 30: 705–706.
		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray	6		IPCN online	Tomb, A. S., K. L. Chambers, D. W. KYHOS, A. M. Powell & P. H. RAVEN. 1978. Chromosome numbers in the Compositae XIV. Lactuceae. Amer. J. Bot. 65: 717–721.
!		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray		24	IPCN72	GRASHOFF, J.L., M.W. BIERNER, & D.K. NORTHINGTON. 1972. Chromosome numbers in North and Central American Compositae. Brittonia 24: 379-394.
!		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray		12	eFlora
		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray		12	Fedorov, 1974	Stebbins et al. 1953
!		Pyrrhopappus rothrockii A. Gray	Pyrrhopappus rothrockii A. Gray		12	Darlington, 1955