Verbatim text: Cornejo, D. O. and B. B. Simpson. 1997. Analysis of form and function in North American columnar cacti (tribe Pachycereae). Amer. J. Bot. 84: 1482–1501.
Author: Cornejo, D.O., Simpson, B.B.
Year: 1997
Title: Analysis of form and function in North American columnar cacti (tribe Pachycereae)
Journal: Amer. J. Bot
Volume: 84
Pages: 1482–1501