Oenothera albicaulis Pursh

A widespread species in much of the western United States, with slightly greyish, basally runcinate-pinnatifid basal leaves, and pinnatifid cauline leaves. Easily confused with Oenothera pallida in keys, but not in person...

Plant habit on the lower part of the Pine Tree Trail at Aguirre Springs on the northeast side of the Organ Mountains, Doña Ana County, New Mexico, 22 Apr 2007.

A flower on the lower part of the Pine Tree Trail, 22 Apr 2007.

Flower bud & upper cauline leaves at Aguirre Springs, 22 Apr 2007.

Basal leaves at Aguirre Springs, 22 Apr 2007.

Plant habit on the east side of the Franklin Mountains, El Paso County, Texas, 12 Mar 2005.

Plant habit on the east side of the Franklin Mountains, 12 Mar 2005.