|Scientific Name||Oenothera cespitosa ssp. cespitosa (Oenthera caespitosa ssp. caespitosa)||USDA PLANTS Symbol||OECAC2|
|Common Name||Tufted Evening Primrose||ITIS Taxonomic Serial No.||27383|
|Family||Onagraceae (Evening Primrose)||SEINet
Life zones and habitat: Plains to montane (4600 to 10000 ft.); dry soils in grasslands and among sagebrush.
Plant: Perennial growing in tufts, up to 12 inches tall, usually stemless; herbage with very short hairs.
Leaves: Basal, petiolate leaves with lanceolate to elliptic blades, 4 to 10 inches long (including petiole) and 3/8 to 1-inch across; margins dentate or irregularly pinnatifid to entire.
Inflorescence: Large, white, showy, solitary flower borne from among the leaves on a short pedicel up to 1-1/4 inches long, petals turning dark rose-purple with age; greenish to reddish floral tube 1-1/2 to 5-1/5 inches long; 4 downward-pointing sepals 3/4 to 2 inches long; protruding style with 4-pronged stigma and 8 protruding white stamens; flowers open around sunset and wilt the next day.
References: "Flora of Colorado" by Jennifer Ackerfield, SEINet and UW Burke Herbarium.
|BONAP Distribution Map
© Tom Lebsack 2022
Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County