| Family | ONAGRACEAE |
| Genus species | Oenothera havardii S.Watson sect. Paradoxus |
| Bibliography | Proc. Amer. Acad. Arts 20: 366 (1885) |
| Native Range | se. Arizona, Texas to n. Mexico |
| Primary Biome | Desert or Dry Shrubland |
| Habitat | dry, stony grassland |
| Altitude | 1300-2000m |
| Description | stem leaves linear-lanceolate, strigose or subglabrous, pinnatilobate to sinuate-dentate, segments remote, flowers solitary, petals elliptic or lanceolate, 2-3cm long |
| Size | 5-25cm |
| Color | yellow, orange |
| Bloom | 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 fall; cuttings in late summer |
| Synonyms | Hartmannia havardii (S.Watson) Rose |
| Territory | 7 Northern America 76 Southwestern U.S.A. (ARI Arizona) 77 South-Central U.S.A. (TEX Texas) 79 Mexico (MXE Mexico Northeast, MXN Mexico Northwest) |