| Family | ONAGRACEAE |
| Genus species | Oenothera maysillesii Munz sect. Oenothera |
| Bibliography | Aliso 4: 490 (1960) |
| Native Range | n. Mexico |
| Primary Biome | Desert or Dry Shrubland |
| Habitat | dry, sandy grassland |
| Altitude | 2100-2600m |
| Description | leaves dark green, thick, coriaceous, coarsely serrate, strigose, stem leaves narrowly ovate to elliptic, 1-3cm, petiolate, flowers solitary, petals broadly obovate, 2-3cm |
| Size | 20-30cm |
| Color | yellow |
| Bloom | spring, early summer |
| Ca | |
| Type | perennial |
| Cultivation | dry, 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 division in fall; cuttings in late summer |
| Territory | 7 Northern America 79 Mexico (MXE Mexico Northeast, MXN Mexico Northwest) |