Family: Evening primrose (Onagraceae)
Size: 4 in.
Other names: Tufted evening primrose, sandlily, rockrose, white stemless evening primrose.
Notes: 21 species of Oenothera in Arizona
This plant is found on the Appleton-Whittell Research Ranch Working Check list of flora.
Photos of this plant can be seen on the CalPhoto plants websites.