Oenothera hartwegii
(Hartweg’s Sundrops)
Oenothera hartwegii, US 385 north of Marathon, Brewster Co. 4512
Oenothera hartwegii, Waterhole Trail, Big Bend Ranch State Park 4760
Oenothera hartwegii, Canyon Rim Trail, Caprock Canyons State Park 7597
Oenothera hartwegii, Camino Viejo Trail, Big Bend Ranch State Park, Brewster Co. 5204
Oenothera hartwegii, US 385 north of Marathon, Brewster Co. 4517
Oenothera hartwegii, Canyon Rim Trail, Caprock Canyons State Park 7608
Oenothera hartwegii, US 385 north of Marathon, Brewster Co. 4504
Oenothera hartwegii, Camino Viejo Trail, Big Bend Ranch State Park, Brewster Co. 5253
| Scientific Name | Oenothera hartwegii (Calylophus hartwegii) | USDA PLANTS Symbol | CAHA14 |
| Common Name | Hartweg's Sundrops | ITIS Taxonomic Serial No. | 517700 |
| Family | Onagraceae (Evening Primrose) | SEINet Reference |
Click Here |
| Description | Habitat: Sandy and limestone soils in various ecologies including deserts, plains, foothills and canyons. Plant: Bushy perennial herb from a woody caudex; stems woody near the base, ascending to almost erect, somewhat branched; 4 to 16 inches tall. Leaves: Alternate, sessile stem leaves with linear to oblong-lanceolate, 3/8 to 2 inches long and 3/16 to 3/8-inch wide; edges entire to denticulate; leaf surfaces smooth, hairy, or glandular-hairy. Inflorescence: Arising from the upper leaf axils, solitary, showy flowers 3/4 to 2+ inches across, with 4 yellow petals becoming reddish; 8 yellow stamens and prominent yellow stigma; 4 sepals reflexed beneath; floral tube 5/8 to 2-1/8 inches long; flower opens in the afternoon or near sunset. Bloom Period: March to October. References: "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