| Family | ONAGRACEAE |
| Genus species | Oenothera fremontii S.Watson sect. Megapterium |
| Bibliography | Proc. Amer. Acad. Arts 8: 587 (1873) |
| Native Range | sc. Nebraska to Kansas |
| Primary Biome | Temperate |
| Habitat | stony grassland |
| Description | densely minutely strigose, stems numerous, leaves grey, 5-10cm, linear to narrowly oblanceolate, flat, entire or denticulate, acute, flowers solitary, petals 25-35mm |
| Size | 5-30cm |
| Color | yellow |
| Bloom | late spring, 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 spring; cuttings in late summer |
| Synonyms | Megapterium fremontii (S.Watson) Britton Oenothera macrocarpa ssp. fremontii (S.Watson) W.L.Wagner Oenothera wrightii Torr. |
| Territory | 7 Northern America 74 North-Central U.S.A. (KAN Kansas, NEB Nebraska) |