The BioFiles - Bill Hubick

Walkingstick Cactus (Cylindropuntia imbricata spinosior)
Tree Cholla Genus Cylindropuntia Family Cactaceae Order Caryophyllales Class Magnoliopsida Phylum Tracheophyta Kingdom Plantae Biodiversity

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About

Native to parts of the southwestern U.S. I first encountered this species near Tucson, Arizona.