Natural hybridization between the cholla cactus species Opuntia spinosior and Opuntia versicolor
Subtitle: (vegetative and sexual reproduction / clonal colonies)
By: Verne Grant and Karen A. Grant
Published: 1971
Language: eng
Number of pages: 1995
Notes: Reprinted from Proc. Nat. Acad. Sci. USA, vol. 68, no. 9, 1971.