| Family | APIACEAE |
| Genus species | Lomatium thompsonii (Mathias) Cronquist |
| Bibliography | Vasc. Pl. Pacif. N.W [C.L. Hitchcock & al.] 3: 563 (1961) |
| Native Range | nc. Washington |
| Primary Biome | Temperate |
| Habitat | rocky slopes |
| Altitude | 300-500m |
| Description | leaves biternate, then bipinnate, segments short, 8-16mm, leaves and stems finely, sparsely pubescent, bracts of involucel filiform, longer than flowers |
| Size | 10-20cm |
| Color | yellow |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed when ripe or in early spring |
| Synonyms | Lomatium suksdorfii var. thompsonii Mathias |
| Territory | 7 Northern America 73 Northwestern U.S.A. (WAS Washington) |