For Cactaceae
Anderson, E.F. 2001. The cactus family. Timber Press, Portland, OR.
Barthlott & Hunt. 1993. In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp.
Benson, L. 1982. The cacti of the United States and Canada. Stanford Univ. Press, Stanford, California.
Britton, N.L., and J.N. Rose. 1937. The Cactaceae: descriptions and illustrations of plants of the Cactus Family. Carnegie Inst. Publ. # 248, Washington, DC, USA.
Fenstermacher, J. 2016. Club chollas of the Big Bend 3.0: refining species concepts and distributions for the Corynopuntia [Opuntia, Grusonia] schottii complex of western Texas via new chromosome counts, pollen stainability, and morphologic data. Phytoneuron 2016-1: 1–58. Published 7 January 2016. ISSN 2153 733X
Hunt, D., N. Taylor, and G. Charles, eds. 2006. The new cactus lexicon. Text. dh books, Milborne Port, England.
Nyffeler, R., and U. Eggli. 2010. Disintegrating Portulacaceae: a new familial classification of the suborder Portulacinae (Caryophyllales) based on molecular and morphological data. Taxon 59: 227-240.
Parfitt, B.D., and A.C. Gibson. 2003a. Cactaceae. In Flora of North America Editorial Committee. 2003b. Flora of North America north of Mexico. Volume 4, Magnoliophyta: Caryophyllidae, part 1. Oxford Univ. Press, New York, NY. 559 pp.
Powell, A.M. and J.F. Weedin. 2004. Cacti of the Trans-Pecos and adjacent areas. Texas Tech University Press, Lubbock, TX.
Weniger, D. 1984. Cacti of Texas and neighboring states: a field guide. Univ. of Texas Press, Austin. 356 pp.
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