Verbatim text: Hunt, D. R. and N. P. Taylor, comps. 1990. The genera of Cactaceae: Progress towards consensus. Bradleya 8: 85–107.
Author: Hunt, D.R., Taylor, N.P., comps,
Year: 1990
Title: The genera of Cactaceae: Progress towards consensus
Journal: Bradleya
Volume: 8
Pages: 85–107