| Calylophus hartwegii (Benth.) Raven | |
| Family: Onagraceae | |
| American Names: | yellow evening primrose, calylophus |
| Duration: | Perennial |
| Regional Nativity: | Yes |
| Growth Season: | Summer |
| Habitat: | woodland, montane forest, grassland |
| Bloom season: | Summer, Spring, Fall |
| Flower color: | Yellow |
