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CCDB → Angiosperms → Cactaceae → Cylindropuntia → Opuntia arbuscula Engelm.

6 chromosome counts in Opuntia arbuscula Engelm.:

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		Name	Accepted Name	Gametophytic(n)	Sporophytic(2n)	Data Source	reference
		Opuntia arbuscula Engelm.	Cylindropuntia arbuscula (Engelm.) F. M. Knuth	33		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.
		Opuntia arbuscula Engelm.	Cylindropuntia arbuscula (Engelm.) F. M. Knuth	33		IPCN online	Pinkava, D. J., J. P. Rebman & M. A. Baker. 1998. Chromosome numbers in some cacti of western North America---VII. Haseltonia 6: 32–41.
!		Opuntia arbuscula Engelm.	Cylindropuntia arbuscula (Engelm.) F. M. Knuth		55	IPCN online	Pinkava, D. J., J. P. Rebman & M. A. Baker. 1998. Chromosome numbers in some cacti of western North America---VII. Haseltonia 6: 32–41.
!		Opuntia arbuscula Engelm.	Cylindropuntia arbuscula (Engelm.) F. M. Knuth	55		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.
!		Opuntia arbuscula Engelm.	Cylindropuntia arbuscula (Engelm.) F. M. Knuth	33		IPCN67-71	PINKAVA, D.J., & M.G. MCLEOD. 1971. Chromosome numbers in some cacti of western North America. Brittonia 23: 171-176.
!		Opuntia arbuscula Engelm.	Cylindropuntia arbuscula (Engelm.) F. M. Knuth		66	IPCN73-74	YUASA, H., H. SHIMIZU, S. KASHIWAI, & N. KONDO. 1974. Chromosome numbers and their bearing on the geographic distribution in the subfamily Opuntioideae (Cactaceae). Rep. Inst. Breed. Research, Tokyo Univ. Agri. No. 4: 1-10.