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Pale Evening Primrose, White Evening Primrose, Pale-Stemmed Evening Primrose - Oenothera pallida


Family: Onagraceae - Evening Primrose family Genus Common Name: Evening Primrose Native Status: NativeDicot Biennial Perennial Herb
Oenothera pallida - Pale Evening Primrose, White Evening Primrose, Pale-Stemmed Evening Primrose. While there are Oenothera species in every state except for Alaska (also in all of Canada except Yukon), Oenothera pallida is a western species, being found in 11 western states, and in British Columbia. Of the few pink or white Oenothera species found in Idaho, where these photos were taken, the others have leaf structures/shapes that are significantly different. It can bloom from mid-spring on well into the fall.

Found in:
AZ, CO, ID, MT, NM, NV, OR, TX, UT, WA, WY

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Oenothera pallida

Distribution of Oenothera pallida in the United States and Canada:
USDA Plants Distribution Map temporarily unavailable.
Blue=Native; Grey=Introduced

Map from USDA Plants Database:
USDA, NRCS. 2017. The PLANTS Database (http://plants.usda.gov, 21 Oct 2017). National Plant Data Team, Greensboro, NC 27401-4901 USA.

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Site: Elephant Rock, Boise Foothills, Ada County, ID Date: 2010-June-19Photographer: Gerald C. Williamson
Nikon D60
Tamron SP 90MM f/2.8 AF Macro
The four petals of Pale Evening Primrose are white, turning pink after pollination. The blossom can be up to 2.5 inches across.
Oenothera pallida

Site: Lucky Peak Area, Boise Foothills, Ada County, ID Date: 2010-June-16Photographer: Cindy Williamson
Nikon D40
There are yellow patches at the base of the white petals.
Click on the photo for a larger image
Oenothera pallida

Site: Lucky Peak Area, Boise Foothills, Ada County, ID Date: 2010-June-16Photographer: Cindy Williamson
Nikon D40
The crossed stigma is what sent me to Oenothera for identification of the flower. Pale Evening Primrose has 8 stamens.
Click on the photo for a larger image
Oenothera pallida

Site: Elephant Rock, Boise Foothills, Ada County, ID Date: 2010-June-19Photographer: Gerald C Williamson
Nikon D60
Tamron SP 90MM f/2.8 AF Macro
Although the usually red stems are also usually fleshy, they can also appear to be woody. The plant may be 6 to 24 inches tall when mature, and although they are herbs, can occasionally appear similar to shrubs.
Click on the photo for a larger image
Oenothera pallida

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All content except USDA Plants Database map Copyright Gerald C. Williamson 2017
Photographs Copyright owned by the named photographer