Search Wildlife
≡
(Tap or click to view all images.)
Photo by Frankie Coburn; Frankie Coburn; Frankie Coburn
Narrow-leaf Evening Primrose
Oenothera acutissima
NatureServe conservation status
Global (G-rank): G2
State (S-rank): S2
External links
Phenology
Flowers in late May-June. Flowers open in the evening, and close by mid-morning.
Species range
Restricted to Moffat County, Colorado and Daggett, Uintah, and Duchesne counties, Utah; Duchesne County, UT has just one occurrence. The Center for Native Ecosystems and Colorado Native Plant Society (2006) describe the range as "in the vicinity of the Flaming Gorge National Recreation Area and around Diamond Mountain, Cold Spring Mountain, and Douglas Mountain at the eastern end of the Uinta Mountains. It has been found as far west as Burnt Mill Spring, northwest of Roosevelt, and as far east as Boone Draw, below Sand Wash Basin in Moffat County, Colorado. The Uinta Mountains are relatively isolated from other mountain environments with similar elevational characteristics, and this isolation likely sets a natural limit on the geographic distribution." Range extent is approximately 5000 - 5500 square km when calculated using GIS tools.
