Oenothera sect. Angora(Spach) W.L.Wagner & Hoch 2007 – western North America in dry, sandy soils in deserts, grasslands, and forest openings, up to 2000 m. elevation.[2]
Oenothera sect. Gauropsis(Torrey & Frémont) W.L.Wagner 1985 – Wyoming, western Nebraska, eastern Colorado, New Mexico, Kansas and the Texas Panhandle in the U.S. High Plains.[26]
Oenothera sect. KleiniaMunz 1965 – distributed over the Chihuahuan, Sonoran, and southern portions of the Great Basin deserts to the Great Plains, from southern Utah to southeastern Montana and western North Dakota, and northern Mexico.[32]
Oenothera sect. LeucocoryneW.L.Wagner & Hoch 2007 – from southern Texas, through northern Mexico to the Trans-Volcanic Belt of central Mexico, southward to Guatemala, Nicaragua, and Costa Rica.[2]
^ abcdefghOnagraceae Wagner, W.L et al. Revised Classification of the Onagraceae (2007)
^USDA, NRCS (n.d.). "Oenothera arizonica". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera engelmannii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera neomexicana". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera nuttallii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera pallida". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera serrulata". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera hartwegii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera lavandulifolia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera toumeyi". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera tubicula". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^O. xylocarpa Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-07
^O. sect. Eremia Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-06
^O. primiveris ssp. bufonis Calflora: Information on California plants for education, research and conservation 2011-12-09
^Common Names The Integrated Taxonomic Information System (ITIS) 2011-12-13
^O. sect. Gauropsis Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-09
^USDA, NRCS (n.d.). "Oenothera canescens". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^O. sect. Hartmannia Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-09
^USDA, NRCS (n.d.). "Oenothera platanorum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-09.
^USDA, NRCS (n.d.). "Oenothera texensis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-09.
^O. sect. Kleinia Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family 2011-12-09
^USDA, NRCS (n.d.). "Oenothera perennis". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^O. pilosella Prairie Wildflowers of Illinois 2011-12-08
^USDA, NRCS (n.d.). "Oenothera pilosella". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-09.
^Richard Dwight Porcher & Douglas Alan Rayner: A guide to the wildflowers of South Carolina, p.292 (2001)
^USDA, NRCS (n.d.). "Oenothera acutissima". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera flava". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^USDA, NRCS (n.d.). "Oenothera triloba". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-07.
^O. dissecta Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family 2011-12-09
^O. kunthiana Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family 2011-12-09
^O. tetraptera Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family 2011-12-09
^USDA, NRCS (n.d.). "Oenothera brachycarpa". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2010-12-09.
^USDA, NRCS (n.d.). "Oenothera howardii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-09.
^USDA, NRCS (n.d.). "Oenothera macrocarpa". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-09.
^O. sect. Oenothera Wagner, W. L. and P. C. Hoch. 2005-. Onagraceae, The Evening Primrose Family 2011-12-08
^O. clelandii Prairie Wildflowers of Illinois 2011-12-08
^USDA, NRCS (n.d.). "Oenothera heterophylla". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-09.
^USDA, NRCS (n.d.). "Oenothera argillicola". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-10.
^USDA, NRCS (n.d.). "Oenothera glazioviana". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-10.
^USDA, NRCS (n.d.). "Oenothera jamesii". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-10.
^USDA, NRCS (n.d.). "Oenothera nutans". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-10.
^USDA, NRCS (n.d.). "Oenothera oakesiana". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-10.
^O. drummondii Wagner, W.L. and P.C. Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-10
^O. falfurriae Wagner, W.L. and P.C. Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-10
^O. mexicana Wagner, W.L. and P.C.Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-10
^O. brandegeei Wagner, W.L. and P.C.Hoch. 2005-. Onagraceae, The Evening Primrose Family 2011-12-10
^O. sect. Paradoxus Wagner, W.L. and P.C.Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-10
^USDA, NRCS (n.d.). "Oenothera linifolia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2011-12-11.
^O. sect. Ravenia Wagner, W.L. and P.C.Hoch. 2005-. Onagraceae, The Evening Primrose Family. 2011-12-10