| Family | ONAGRACEAE |
| Genus species | Oenothera hartwegii Benth. sect. Calylophus |
| Bibliography | Pl. Hartw.: 5 (1839) |
| Native Range | Colorado, sw. Texas to n. & w. Mexico |
| Primary Biome | Desert or Dry Shrubland |
| Habitat | dry, stony grassland |
| Altitude | 30-2500m |
| Description | leaves numerous, not crowded, linear, 1-4cm, entire or obscurely denticulate, flowers few, sepals ca. 2cm long, petals 2-3cm long |
| Size | 10-40cm |
| Color | yellow |
| Bloom | summer |
| Ca | |
| Type | subshrub |
| 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 cuttings in late summer |
| Synonyms | Calylophus hartwegii (Benth.) P.H.Raven Galpinsia hartwegii (Benth.) Britton Galpinsia lavandulifolia var. glandulosa (Munz) Moldenke Oenothera hartwegii f. thymifolia H.Lév. Oenothera hartwegii var. typica Munz Oenothera lavandulifolia var. glandulosa Munz Salpingia hartwegii (Benth.) Raim. |
| Territory | 7 Northern America 73 Northwestern U.S.A. (COL Colorado) 77 South-Central U.S.A. (TEX Texas) 79 Mexico (MXE Mexico Northeast, MXN Mexico Northwest, MXS Mexico Southwest) |