Ipomoea arborea
An arborescent Ipomoea not occurring in the U.S., found, among other places, in deep canyons of the Sierra Madre Occidental.
Flowering branches in the bottom of Barranca de Batopilas, Chihuahua, 22 Mar 2007.
A flower in Barranca de Batopilas, 22 Mar 2007.