Pale Evening Primrose

 Pale Evening Primrose, courtesy of Dr. Doug Ramsey, Utah State University

 Photo courtesy of Dr. R. Doug Ramsey, Utah State University

Common Name(s):   
Pale Evening-primrose
Pale Primrose
White Buttercup
Scientific Name:                   
Oenothera pallida Lindl.
Scientific Name Synonyms:
None known
Life Span: Perennial

Origin: Native

Growth Characteristics: Pale evening primrose grow 4-27 inches tall, spreads out to 24-30 inches, blooms May until December.

Flowers: Pale evening primrose has large, 2-3 inch blooms and a yellow eye. Blooms are white fading to pink. Petals have noticeable yellow/green patches at their base.

Fruits/Seeds: Capsules which are conspicuously 4-winged. 

Leaves: Pale evening primrose leaves are narrow and can be entire, toothed, lobed, etc. 

Stems: Stems of pale evening primrose are white and exfoliating.

Roots: Rhizomatous
Ecological Adaptations:

Pale evening primrose is found in semi-desert, and foothills systems. 

Soils: Well-drained, rocky, sandy soils. 

Associated Species: Pinyon pine, Utah juniper, shadscale.
Uses and Management:
Cattle seem to avoid evening-primrose. Young shoots and roots of some evening-primroses are eaten by humans.