| Family | ONAGRACEAE |
| Genus species | Oenothera serrulata Nutt. sect. Calylophus |
| Bibliography | Gen. N. Amer. Pl. 1: 246 (1818) |
| Native Range | c. Canada to w. & c. USA and ne. Mexico |
| Primary Biome | Temperate |
| Habitat | steppes |
| Altitude | 0-2100m |
| Description | stems thin, branched, leaves alternate, linear to oblong or spathulate, serrate to entire, flowers sessile, axillary, petals crenulate |
| Size | 10-60cm |
| Color | yellow |
| Bloom | late 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 | Calylophus australis Towner & P.H.Raven Calylophus drummondiana Spach Calylophus nuttallii Spach Calylophus serrulata (Nutt.) P.H.Raven Calylophus serrulata var. arizonicus Shinners Calylophus serrulata var. spinulosus (Nutt.) Shinners Meriolix drummondiana (Spach) Small Meriolix intermedia Rydb. Meriolix oblanceolata Rydb. Meriolix serrulata (Nutt.) Raf. Meriolix serrulata var. douglasii (Torr. & A.Gray) Walp. Meriolix serrulata var. drummondii (Torr. & A.Gray) Walp. Meriolix serrulata var. nuttallii Walp. Meriolix serrulata var. spinulosa (Nutt.) Small Meriolix spinulosa (Nutt.) A.Heller Oenothera leucocarpa Comien Oenothera serrulata var. douglasii Torr. & A.Gray Oenothera serrulata ssp. drummondii (Torr. & A.Gray) Munz Oenothera serrulata var. drummondii Torr. & A.Gray Oenothera serrulata f. flava Munz Oenothera serrulata var. integrifolia H.Lév. Oenothera serrulata var. maculata H.Lév. Oenothera serrulata var. nuttallii Torr. & A.Gray Oenothera serrulata var. oblanceolata (Rydb.) F.C.Gates Oenothera serrulata var. spinulosa Torr. & A.Gray Oenothera serrulata var. typica Munz Oenothera spinulosa Nutt. |
| Territory | 7 Northern America 71 Western Canada (ABT Alberta, MAN Manitoba, SAS Saskatchewan) 72 Eastern Canada (ONT Ontario) 73 Northwestern U.S.A. (COL Colorado, MNT Montana, WYO Wyoming) 74 North-Central U.S.A. (ILL Illinois, IOW Iowa, KAN Kansas, MIN Minnesota, MSO Missouri, NDA North Dakota, NEB Nebraska, OKL Oklahoma, SDA South Dakota, WIS Wisconsin) 75 Northeastern U.S.A. (INI Indiana, MIC Michigan, VER Vermont) 76 Southwestern U.S.A. (ARI Arizona) 77 South-Central U.S.A. (NWM New Mexico) 78 Southeastern U.S.A. (ARK Arkansas, KTY Kentucky) 79 Mexico (MXE Mexico Northeast) |