Oenothera triloba
(Stemless Evening Primrose)
Oenothera triloba, Lake Whitney State Park, Hill Co. 7801
Oenothera triloba, Lake Whitney State Park, Hill Co. 7813
Oenothera triloba, McKinney Falls State Park, Travis Co. 2885
Oenothera triloba, McKinney Falls State Park, Travis Co. 2883
Oenothera triloba, McKinney Falls State Park, Travis Co. 2890
Oenothera triloba, Lake Whitney State Park, Hill Co. 7809
Oenothera triloba, Lake Whitney State Park, Hill Co. 7807
| Scientific Name | Oenothera triloba | USDA PLANTS Symbol | OETR2 |
| Common Name | Stemless Evening Primrose | ITIS Taxonomic Serial No. | 27420 |
| Family | Onagraceae (Evening Primrose) | SEINet Reference |
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| Description | Habitat: Relatively moist clay or calcareous soils in grassy slopes, open areas, and floodplains. Plant: Short, erect winter annual or biennial with short or no stem (just a long floral tube); less than 8 inches tall. Leaves: Basal rosette of elliptic to oblanceolate overall, all or lower portion irregularly pinnatifid; 1-1/4 to 12 inches long and 3/8 to 1-5/8 inches wide on petioles 3/8 to 2+ inches long. Inflorescence: Large yellow blossoms up to 3 inches across, 4 petals with crinkled edges; floral tube 2 to 4 inches long; 8 conspicuous stamens; opening near sunset and closing well before noon. Bloom Period: February to July. References: "Wildflowers of Texas" by Geyata Ajilvsgi, "Manual of the Vascular Plants of Texas" by Correll and Johnston and SEINet. |
BONAP Distribution Map Map Color Key |
Texas Status: Native |
Banner photo of Castilleja indivisa and Lupinus ssp. taken along FM 1323 north of Johnson City, Blanco County
© Tom Lebsack 2024