''Metastelma arizonicum'', synonym ''Cynanchum arizonicum'', the Arizona swallow-wort or Arizona climbing milkweed, is a plant native to

Arizona Arizona is a U.S. state, state in the Southwestern United States, Southwestern region of the United States, sharing the Four Corners region of the western United States with Colorado, New Mexico, and Utah. It also borders Nevada to the nort ...

New Mexico New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also ...

and

Sonora Sonora (), officially Estado Libre y Soberano de Sonora (), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. The state is divided into Municipalities of Sonora, 72 ...

. It is a twining, herbaceous vine with whitish to yellow flowers, growing on rocky slopes and in canyons of desert mountain ranges.Gray, A. Proceedings of the American Academy of Arts and Sciences 19: 85. 1883.

References

arizonicum Flora of Arizona Flora of Sonora Flora of New Mexico Plants described in 1883 {{Apocynaceae-stub