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Oenothera gayleana

Oenothera gayleana B. L. Turner & M. J. Moore

Gypsum Evening Primrose

Onagraceae (Evening Primrose Family)


USDA Symbol: OEGA2

USDA Native Status: L48 (N)


Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Breeding System: Flowers Bisexual
Fruit Type: Capsule
Size Notes: "15-30(-40) cm high and about as wide, the stems decidedly ascending and arising from woody taproots with caudices 0.5-2.0 cm (occasionally to 3 cm) in diameter." Reslit: 2996.
Leaf: "Conduplicate, linear to narrowly linear-lanceolate, not much reduced upwards, those at mid-stem mostly 25-35 mm long, 1-2 mm wide, 10-15(-20) times as long as wide, sparsely strigose to glabrous, the margins nearly entire to slightly serrate." Reslit: 2996
Fruit: "Capsules linear-arcuate, moderately strigose, 18-20 mm long, ca. 2 mm wide." Reslit: 2996.

Bloom Information

Bloom Color: Yellow
Bloom Time: May , Jun , Jul , Aug , Sep


Native Distribution: "Western Texas (Panhandle and trans-Pecos areas), southeastern New Mexico, and western Oklahoma." Reslit: 2996.
Native Habitat: "Bare gypseous outcrops." Reslit: 2996.

Growing Conditions

Water Use: Low
Light Requirement: Sun
Soil Moisture: Dry
Drought Tolerance: High
Soil Description: Gypseous.


Conspicuous Flowers: yes

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


Record Modified: 2023-06-19
Research By: Joseph A. Marcus

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