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Prof. Itay Mayrose Lab – Plant Evolution, Bioinformatics, & Comparative Genomics







CCDB is a community resource. If you are aware of any missing data or if any of the counts are erroneous, please submit new counts, or report erroneous counts.


CCDB → Angiosperms → Cactaceae → Opuntia → Opuntia macrorhiza Engelm.

16 chromosome counts in Opuntia macrorhiza Engelm.:


Name Accepted Name Gametophytic(n) Sporophytic(2n) Data Source reference
!   Opuntia macrorhiza Engelm. Opuntia macrorhiza Engelm. 22   Baker, 2009  
!   Opuntia cymochila Engelm. & J. M. Bigelow Opuntia macrorhiza Engelm. c.33II   IPCN online Powell, A. M. & J. F. Weedin. 2005. Documented chromosome numbers 2005: 2. Counts from western Texas, mostly trans-Pecos cacti. Sida 21(3): 1665–1668.
!   Opuntia cymochila Engelm. & J. M. Bigelow Opuntia macrorhiza Engelm. 33II   IPCN online Powell, A. M. & J. F. Weedin. 2001. Chromosome numbers in Chihuahuan Desert Cactaceae. III. Trans-Pecos Texas. Amer. J. Bot. 88(3): 481–485.
  Opuntia macrorhiza Engelm. Opuntia macrorhiza Engelm. 22II   IPCN online Powell, A. M. & J. F. Weedin. 2001. Chromosome numbers in Chihuahuan Desert Cactaceae. III. Trans-Pecos Texas. Amer. J. Bot. 88(3): 481–485.
!   Opuntia tortispina Engelm. & J. M. Bigelow Opuntia macrorhiza Engelm. 33II c.66 IPCN online Powell, A. M. & J. F. Weedin. 2001. Chromosome numbers in Chihuahuan Desert Cactaceae. III. Trans-Pecos Texas. Amer. J. Bot. 88(3): 481–485.
  Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm.   44 IPCN online Pinkava, D. J., B. D. Parfitt, M. A. Baker & R. D. Worthington. 1992. Chromosome numbers in some cacti of western North America---VI, with nomenclatural changes. Madroño 39(2): 98–113.
  Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. 22   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 macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. 22   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.
  Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. ca.22   IPCN online Weedin, J. F. & A. M. Powell. 1978. Chromosome numbers in Chihuahuan desert Cactaceae. Trans-Pecos Texas. Amer. J. Bot. 65: 531–537.
!   Opuntia mackensenii Rose Opuntia macrorhiza Engelm. 22II   IPCN online Powell, A. M. & J. F. Weedin. 2005. Documented chromosome numbers 2005: 2. Counts from western Texas, mostly trans-Pecos cacti. Sida 21(3): 1665–1668.
!   Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. 22   IPCN67-71 PINKAVA, D.J., & M.G. MCLEOD. 1971. Chromosome numbers in some cacti of western North America. Brittonia 23: 171-176.
!   Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. ca.22   IPCN75-78 Weedin & Powell 1978a
!   Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. 22   IPCN75-78 Pinkava et al. 1977
!   Opuntia macrorhiza var. macrorhiza Opuntia macrorhiza Engelm. 22   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.
!   Opuntia macrorhiza Engelm. Opuntia macrorhiza Engelm.   44 eFlora  
!   Opuntia tortispina Engelm. & J. M. Bigelow Opuntia macrorhiza Engelm.   44,66 eFlora