| Family | ONAGRACEAE |
| Genus species | Oenothera cespitosa Nutt. sect. Pachylophus |
| Bibliography | Cat. Pl. Upper Louisiana [J.Fraser]: no. 53 (1813) |
| Native Range | wc. & c. Canada to n. Mexico |
| Primary Biome | Desert or Dry Shrubland |
| Habitat | dry, rocky slopes |
| Altitude | 400-3400m |
| Description | subcaulescent, leaves oblanceolate, 10-25cm, thinly petiolate, entire or pinnatilobate, flowers fading pink, petals 25-45mm long, flowers opening in night |
| Size | 5-15cm |
| Color | pink, white |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny, dry, rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 18-21°C cuttings in late summer |
| Synonyms | Oenothera cespitosa f. albiflora H.Lév. Oenothera cespitosa f. caulescens H.Lév. Oenothera cespitosa var. montana (Nutt.) Durand Oenothera cespitosa ssp. montana (Nutt.) Munz Oenothera cespitosa ssp. purpurea (S.Watson) Munz Oenothera cespitosa var. purpurea (S.Watson) Munz Oenothera cespitosa var. typica Munz Oenothera exigua A.Gray Oenothera marginata var. purpurea S.Watson Oenothera montana Nutt. Oenothera scapigera Pursh Pachylophus cespitosa (Nutt.) Raim. Pachylophus exiguus (A.Gray) Rydb. Pachylophus glaber A.Nelson Pachylophus montanus (Nutt.) A.Nelson Pachylophus nuttalliana Spach Pachylophus nuttallii Spach |
| Territory | 7 Northern America 71 Western Canada (ABT Alberta, MAN Manitoba, SAS Saskatchewan) 73 Northwestern U.S.A. (COL Colorado, IDA Idaho, MNT Montana, ORE Oregon, WAS Washington, WYO Wyoming) 74 North-Central U.S.A. (NDA North Dakota, NEB Nebraska, SDA South Dakota) 76 Southwestern U.S.A. (ARI Arizona, CAL California, NEV Nevada, UTA Utah) 77 South-Central U.S.A. (NWM New Mexico) |