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

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

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

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

Oenothera hookeri

Oenothera rhombipetala

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

Oenothera sp.

Petals not emarginate, relatively small.  Inyo Co., CA, north of Bishop, May 2006

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