Metastelma arizonicum explained

Metastelma arizonicum, synonym Cynanchum arizonicum, the Arizona swallow-wort or Arizona climbing milkweed, is a plant native to Arizona, New Mexico and Sonora. It is a twining, herbaceous vine with whitish to yellow flowers, growing on rocky slopes and in canyons of desert mountain ranges.^{[1] [2] [3]}

Notes and References

1. Sundell, A. 1993. Asclepiadaceae, Milkweed Family. Journal of the Arizona-Nevada Academy of Science 27:169-187.
2. Shinners, L.H. Sida 1(6): 365. 1964.
3. Gray, A. Proceedings of the American Academy of Arts and Sciences 19: 85. 1883.