Oenothera albicaulis Pursh
Whitest Evening-primrose, White-stem Evening-primrose, Pale Evening-primrose
Onagraceae (Evening Primrose Family)
Synonym(s): Anogra albicaulis, Oenothera ctenophylla
USDA Symbol: oeal
This is a winter annual with stems up to 1 ft. long spreading horizontally in a circle from the root. Basal leaves are spatula-shaped; the upper leaves are pinnately cleft into wavy-margined, narrow lobes. Showy flowers are made up of four, white, heart-shaped petals.
Flowers open near sunset but remain open for several days.
From the Image Gallery
Plant CharacteristicsDuration: Annual
Fruit Type: Capsule
Size Notes: Stems up to about 1 foot long. Central stem erect or ascending, other stems ascending to decumbent.
Bloom InformationBloom Color: White , Pink
Bloom Time: Feb , Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov , Dec
Bloom Notes: White, fading to pink.
DistributionUSA: AZ , CO , IL , KS , MT , ND , NE , NM , NV , NY , OK , SD , TX , UT , WY
Native Distribution: MT to AZ, e. to w. ND, w. KS, TX & n. Mex.
Native Habitat: Sandy roadsides & fields
Growing ConditionsLight Requirement: Sun
Soil Description: Sandy soils.
Conditions Comments: Flowers open near sunset but remain open for several days.
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Sibley Nature Center - Midland, TX
Web ReferenceWebref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Oenothera albicaulis in USDA Plants
FNA: Find Oenothera albicaulis in the Flora of North America (if available)
Google: Search Google for Oenothera albicaulis
MetadataRecord Modified: 2023-02-21
Research By: TWC Staff