| Family | ONAGRACEAE |
| Genus species | Oenothera sessilis (Pennel) Munz sect. Kneiffia |
| Bibliography | Bull. Torrey Bot. Club 64: 291 (1937) |
| Native Range | se. Texas to Arkansas |
| Primary Biome | Temperate |
| Habitat | steppes |
| Altitude | 0-100m |
| Description | densely strigose, glabrescent, basal leaves petiolate, oblanceolate, entire, stem leaves lanceolate, subentire, flowers axillary, tube of corolla 10-15mm, petals 15-25mm |
| Size | 20-45cm |
| Color | bright yellow |
| Bloom | spring, early summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny site with a deep, drained soil alpine house, rich, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 18-21°C division in fall; cuttings in late summer |
| Synonyms | Kneiffia sessilis Pennell Oenothera pilosella ssp. sessilis (Pennell) Straley Oenothera pilosella var. sessilis (Penell) B.L.Turner |
| Territory | 7 Northern America 77 South-Central U.S.A. (TEX Texas) 78 Southeastern U.S.A. (ARK Arkansas, LOU Louisiana) |