| Family | ONAGRACEAE |
| Genus species | Oenothera acutissima W.L.Wagner sect. Lavauxia |
| Bibliography | Syst. Bot. 6: 153 (1981) |
| Native Range | nw. Colorado to ne. Utah |
| Primary Biome | Temperate |
| Habitat | sandy grassland |
| Altitude | 1800-2600m |
| Description | long, branched, woody taproot, leaves irregularly pinnatipartite to pinnatisect, flowers solitary, 3-5cm across, flowering in the evening, capsule 4 winged |
| Size | 1-5cm |
| Color | yellow |
| Bloom | late spring, summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny site with a poor, sandy soil alpine house, sandy soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 18-21°C cuttings in late summer |
| Synonyms | Oenothera flava var. acutissima (W.L.Wagner) S.L.Welsh |
| Territory | 7 Northern America 73 Northwestern U.S.A. (COL Colorado) 76 Southwestern U.S.A. (UTA Utah) |