Gonolobus arizonicus, common name Arizona milkvine,Altervista Flora of North America, Matelea arizonica (A. Gray) Shinners, Arizona milkvine is a species of plant in the family Apocynaceae. It is endemic to Arizona, found in Pima, Santa Cruz, Pinal, and Graham Counties.Krings, Alexander. 2008. Synopsis of Gonolobus s.l. (Apocyanceae, Asclepiadoideae) in the United States and its territories, including lectotypification of Lachnostoma arizonicum. Harvard Papers in Botany 13(2): 210.Gray, Asa. 1885. Proceedings of the American Academy of Arts and Sciences 20: 296Biota of North America Program, 21013 county distribution map, Matelea arizonica
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External links photo of herbarium specimen at Missouri Botanical Garden, isolectotype of Lachnostoma arizonicum, collected in Santa Catalina Mountains of Pima County, Arizona