Fragrant evening primrose

Quick look

Oenothera cespitosa, known commonly as tufted evening-primrose or fragrant evening-primrose, is a perennial plant of the genus Oenothera native to western North America from the western edge of the Great Plains and all parts of the Intermountain West in a wide range of dry habitats. Its flowers are open at night and fade by the next day. The species is cultivated in gardens, particularly in its native range.

• It belongs to the Onagraceae family. ^iNaturalist
• USDA PLANTS describes it as an herb (forb) / a subshrub with a perennial life cycle. ^{USDA PLANTS}
• USDA PLANTS lists it as native in the lower 48 states and records it in 15 states. ^{USDA PLANTS}
• NatureServe lists it as native to Colorado, Utah, South Dakota and North Dakota. ^NatureServe
• In Colorado, most iNaturalist sightings of it in flower come in April–July. ^iNaturalist
• In Utah, most iNaturalist sightings of it in flower come in April–July. ^iNaturalist
• USDA PLANTS lists its flower color as white. ^{USDA PLANTS}
• USDA PLANTS gives its bloom period as late spring. ^{USDA PLANTS}
• USDA PLANTS lists a mature height of about 0.5 ft. ^{USDA PLANTS}
• iNaturalist has 1,807 research-grade sightings of it in Colorado, ranking #90 among the 110 flowers on our Colorado list. ^iNaturalist
• iNaturalist has 1,446 research-grade sightings of it in Utah, ranking #27 among the 109 flowers on our Utah list. ^iNaturalist
• iNaturalist has 165 research-grade sightings of it in South Dakota, ranking #92 among the 108 flowers on our South Dakota list. ^iNaturalist