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Marcus, Joseph A.

Oenothera jamesii

Oenothera jamesii Torr. & A. Gray

Trumpet Evening-primrose, Trumpet Evening Primrose, River Primrose

Onagraceae (Evening Primrose Family)

Synonym(s):

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

Distribution

USA: 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 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.

Benefit

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

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

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:			FACW			FACW

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

Bibliography

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

Metadata

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

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