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Rare Plant Field Guide




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Photo Copyright © 1999 by B. Jennings

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Onagraceae (Evening-Primrose Family)

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Synonym: Oenothera flava var. acutissima

Look Alikes: O. flava taproot is fleshy and stout, and capsule wings are 1- 2 mm wide.

Flowering/Fruiting Period: Flowers in late May-June.

Habitat: Sandy, gravelly and rocky soils, in seasonally wet areas; in meadows, depressions, or along arroyos in mixed conifer forest to sage-brush scrub. Elev. 5300-8500 ft.

Photo Copyright © 1999 acutissima courtesy of the Colorado Natural Heritage Program
Distribution: Endemic to Utah and adjacent Colorado (Moffat Co.).

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References: Wagner 1981.



Please send comments to: Colorado Natural Heritage Program
254 General Services Building, Colorado State University · Fort Collins, CO 80523 · (970) 491-2992