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Oenothera jamesii Torr. & A. Gray
Trumpet Evening-primrose, Trumpet Evening Primrose, River Primrose
Onagraceae (Evening Primrose Family)
USDA Symbol: OEJA
USDA Native Status: L48 (N)
From the Image Gallery
Plant CharacteristicsDuration: Biennial
Leaf Retention: Deciduous
Fruit Type: Capsule
Size Notes: Up to about 6 feet tall.
Bloom InformationBloom Color: Yellow
Bloom Time: Jul , Aug , Sep , Oct
DistributionUSA: KS , OK , TX
Native Habitat: Scattered on stream banks in wet places from Edwards Plateau and Llano area west to the Trans-Pecos; OK and west TX south to Coahuila.
Growing ConditionsLight Requirement: Sun
Soil Moisture: Wet
Heat Tolerant: yes
Conditions Comments: Showy butter yellow flowers open late afternoon or early evening, making it a great addition to a night-time garden. Plants are vase shaped overall and tall, so a location in the back of a bed is appropriate. Propagate by seed in well drained soil. Provide regular or high summer water.
BenefitConspicuous Flowers: yes
Interesting Foliage: yes
Nectar Source: yes
Deer Resistant: Moderate
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationPropagation Material: Root Division
Maintenance: Prevent complete soil dryness, Maintain mulch layer, Remove spent blossoms, Fertilize in spring with rose food
National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Lady Bird Johnson Wildflower Center - Austin, TX
NPSOT - Williamson County Chapter - Georgetown, TX
Herbarium Specimen(s)NPSOT 0634 Collected Sep 25, 1993 in Bexar County by Mike Fox
BibliographyBibref 766 - Dale Groom's Texas Gardening Guide (2002) Groom, D.
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
Search More Titles in Bibliography
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 jamesii in USDA Plants
FNA: Find Oenothera jamesii in the Flora of North America (if available)
Google: Search Google for Oenothera jamesii
MetadataRecord Modified: 2023-02-21
Research By: DEW, JSC, ADA, WFS