| Family | LOASACEAE |
| Genus species | Mentzelia laevicaulis (Douglas ex Hook.) Torr. & A.Gray |
| Bibliography | Fl. N. Amer. 1: 535 (1840) |
| Native Range | w. Canada to w. USA |
| Primary Biome | Temperate |
| Habitat | sandy grassland |
| Description | leaves alternate, lower leaves oblanceolate, deeply remote-dentate, petiolate, to 15cm long, flowers terminal, petals 25-80mm long, oblong, anthers numerous |
| Size | 30-100cm |
| Color | lemmon yellow |
| Bloom | late summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny site with a poor, sandy soil alpine house, sandy soil, sun |
| Propagation | seed in spring, barely covered, germ. 1-3 months, 13-18°C cuttings in late spring and in summer |
| Synonyms | Bartonia laevicaulis Douglas ex Hook. Hesperaster laevicaulis Cockerell Mentzelia acuminata (Rydb.) Tidestr. Mentzelia laevicaulis var. acuminata (Rydb.) A.Nelson & J.F.Macbr. Nuttallia acuminata Rydb. Nuttallia laevicaulis (Douglas ex Hook.) Greene Touterea laevicaulis (Douglas ex Hook.) Rydb. |
| Territory | 7 Northern America 71 Western Canada (BRC British Columbia) 73 Northwestern U.S.A. (COL Colorado, IDA Idaho, MNT Montana, ORE Oregon, WAS Washington, WYO Wyoming) 76 Southwestern U.S.A. (ARI Arizona, CAL California, NEV Nevada, UTA Utah) |