Page author: David Giblin
Oenothera cespitosa ssp. cespitosa
butte primrose, fragrant evening primrose, rock rose

Distribution: Sporadic in central and eastern Washington; widespread throughout western U.S. and central Canada.

Habitat: Dry slopes and forest openings, rock outcroppings, and talus.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Sensitive in Washington (WANHP)

Pollination: Bees, moths


[none provided]

Accepted Name:
Oenothera cespitosa Nutt. ssp. cespitosa
Publication: Cat. Pl. Upper Louisiana no. 53 [pre-Aug 1813]. 1813.

Synonyms & Misapplications:
Oenothera caespitosa Nutt. ssp. caespitosa, orthographic variant
Oenothera caespitosa Nutt. var. caespitosa, orthographic variant [HC]
Oenothera caespitosa Nutt. var. montana (Nutt.) Durand, orthographic variant [HC]
Oenothera caespitosa Nutt. var. purpurea (S. Watson) Munz, orthographic variant [HC]
Oenothera cespitosa Nutt. ssp. montana (Nutt.) Munz
Oenothera cespitosa Nutt. ssp. purpurea (S. Watson) Munz
Additional Resources:

PNW Herbaria: Specimen records of Oenothera cespitosa ssp. cespitosa in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Oenothera cespitosa ssp. cespitosa checklist entry

OregonFlora: Oenothera cespitosa ssp. cespitosa information

E-Flora BC: Oenothera cespitosa ssp. cespitosa atlas page

CalPhotos: Oenothera cespitosa ssp. cespitosa photos

36 photographs:
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