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CCDB → Angiosperms → Cactaceae → Ferocactus → Ferocactus gracilis var. gracilis

4 chromosome counts in Ferocactus gracilis var. gracilis:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Ferocactus gracilis var. gracilis	Ferocactus gracilis H. E. Gates	11		IPCN online	Pinkava, D. J., M. A. Baker, B. D. Parfitt, M. W. Mohlenbrock & R. D. Worthington. 1985. Chromosome numbers in some cacti of western North America-V. Syst. Bot. 10: 471–483.
		Ferocactus gracilis var. gracilis	Ferocactus gracilis H. E. Gates	11		IPCN online	Pinkava, D. J., L. A. MCGILL & T. REEVES. 1977. Chromosome numbers in some cacti of western North America---III. Bull. Torrey Bot. Club 104: 105–110.
!		Ferocactus gracilis var. gracilis	Ferocactus gracilis H. E. Gates	11		IPCN75-78	Pinkava et al. 1977
!		Ferocactus gracilis var. gracilis	Ferocactus gracilis H. E. Gates	11		IPCN73-74	PINKAVA, D.J., M.G. MCLEOD, L.A. MCGILL, & R.C. BROWN. 1973. Chromosome numbers in some cacti of western North America-II. Brittonia 25: 2-9.