Proatriplex

Proatriplex is a monotypic plant genus in the subfamily Chenopodioideae of the family Amaranthaceae, with the only species Proatriplex pleiantha (syn. Atriplex pleiantha). It is known by the common names four-corners orach and Mancos shadscale. It occurs in the Navajo Basin of Arizona, Colorado, New Mexico, and Utah.

==Description== thumb|left|Proatriplex pleiantha detail of leaves and flowers Proatriplex pleiantha is an annual plant of 5–17 cm, glabrous, sometimes slightly farinose. The erect stems are branched from base with white-yellow or reddish ascending branches. The alternate or sometimes nearly opposite leaves are petiolate. The succulent, bright green leaf blades of 5–28 mm length and width are ovate to suborbiculate with entire margins. The leaf anatomy is of the "normal" (non-Kranz) type of C3-plants.