| Family | APIACEAE |
| Genus species | Lomatium ambiguum (Nutt.) J.M.Coult. & Rose |
| Bibliography | Contr. U.S. Natl. Herb. 7: 212 (1900) |
| Native Range | British Columbia to Utah |
| Primary Biome | Temperate |
| Habitat | rocky slopes |
| Description | glabrous, acaulescent, petioles at base dilate, leaves 1-2-pinnate, segments elongate-linear, rays equal, 8-18, 3-8cm, involucre absent, achenes oblong, glabrous, narrowly alate |
| Size | 15-25cm |
| Color | yellow |
| Bloom | early summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed when ripe or as soon as possible |
| Synonyms | Cogswellia ambigua (Nutt.) M.E.Jones Cogswellia laevigata (Nutt.) M.E.Jones Eulophus ambiguus Nutt. Peucedanum abrotanifolium Nutt. Peucedanum ambiguum (Nutt.) Nutt. Peucedanum ambiguum var. leptocarpum J.M.Coult. & Rose Peucedanum laevigatum Nutt. |
| Territory | 7 Northern America 71 Western Canada (BRC British Columbia) 73 Northwestern U.S.A. (IDA Idaho, MNT Montana, ORE Oregon, WAS Washington, WYO Wyoming) 76 Southwestern U.S.A. (UTA Utah) |