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Oenothera jamesii (Trumpet evening-primrose)
Marcus, Joseph A.

Oenothera jamesii

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

53 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Biennial
Habit: Herb
Leaf Retention: Deciduous
Fruit Type: Capsule
Size Notes: Up to about 6 feet tall.

Bloom Information

Bloom Color: Yellow
Bloom Time: Jul , Aug , Sep , Oct


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 Conditions

Light 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.


Conspicuous Flowers: yes
Interesting Foliage: yes
Attracts: Butterflies
Nectar Source: yes
Deer Resistant: Moderate

Value to Beneficial Insects

Special Value to Native Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.


Propagation Material: Root Division
Maintenance: Prevent complete soil dryness, Maintain mulch layer, Remove spent blossoms, Fertilize in spring with rose food

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According 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

1 specimen(s) available in the Digital Herbarium


Bibref 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 Reference

Webref 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 resources

USDA: Find Oenothera jamesii in USDA Plants
FNA: Find Oenothera jamesii in the Flora of North America (if available)
Google: Search Google for Oenothera jamesii


Record Modified: 2023-02-21
Research By: DEW, JSC, ADA, WFS

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