Oenothera californica
East Kern Canyon Trail along the Kern River near the southwest area of Lake Isabella, CA.
08 Apr 2012

Oenothera cespitosa ssp. marginata
Los Angele Co., Pine Canyon Rd, CA
24 Apr 2014

Oenothera engelmanni

Oenothera hookeri

Oenothera rhombipetala

Oenothera deltoides
SE of Sheephole Mts., CA
Spjut 15752, Mar 2004

Oenothera deltoides
Ford Dry Lake, CA
Spjut 15271, May 2003

Oenothera deltoides
Utah—Great Basin Desert. Wayne Co.: E of Caineville, Road 6650E, north off Hwy 24; 38º22'27.3", 110º53.51.9", 1420 m.  Barren alkali lake with Atriplex gardneri and Oenothera along road margin.  Photo by Susan Spjut, May 2008

Oenothera pallida
Zion Natl. Park, UT
May 2008

Oenothera primiveris
29 Palms, CA
Spjut 15825, Mar 2005

Oenothera primiveris
California—Mojave Desert. San Bernardino Co. Nipton Road, south of Ivanpah Dry Lake. Spjut 15825, 21 Mar 2008

Gaura coccinea
Brewster Co., TX
Big Bend Natl. Park
Spjut & Marin15120, Nov 2002

Pettit G. R., P. M. Traxler and C. P. Pase.  1973.  Antineoplastic agents 31. Oenothera caespitosa.  Lloydia 36(2): 202–203.