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

Sonora Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of 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 d ...

. 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