Natural Hybridization between the Cholla Cactus Species Opuntia spinosior and Opuntia versicolor
Verne Grant and Karen A. GrantVolume:
68
Language:
english
Journal:
Proceedings of the National Academy of Sciences of the United States of America
DOI:
10.2307/60831
Date:
September, 1971
File:
PDF, 943 KB
english, 1971