Oxalis decaphylla

A many-leafletted Oxalis found in eastern Arizona, western New Mexico, and south into Mexico. Despite the name, it rarely has precisely ten leaflets.

Plant habit near Chihuahua Highway 25 south of Creel at ca. km 121, Chihuahua, Mexico, 6 Sep 2009. Photographed on a trip with the American Penstemon Society.