| Family | APIACEAE |
| Genus species | Lomatium tenuissimum (Geyer ex Hook.) M.A.Feist & Plunkett |
| Bibliography | Phytotaxa 316: 96 (2017) |
| Native Range | n. Idaho to e. Washington |
| Primary Biome | Temperate |
| Habitat | grassland |
| Altitude | 750-1000m |
| Description | glabrous, leaves few, ternate, segments narrowly linear, to 5cm long and 2mm wide, rays of umbel 4-8, bracts of involucre inconspicuous, linear, 1-3mm long |
| Size | 3-25cm |
| Color | white |
| Bloom | spring |
| Ca | |
| Type | perennial |
| Cultivation | mesic, slightly humous, sunny site alpine house, rich, drained soil, sun |
| Propagation | seed when ripe or as soon as possible |
| Synonyms | Cogswellia orogenioides (J.M.Coult. & Rose) M.E.Jones Leibergia orogenioides J.M.Coult. & Rose Lomatium orogenioides (J.M.Coult. & Rose) Mathias Museniopsis tenuissima (Geyer ex Hook.) J.M.Coult. & Rose Peucedanum tenuissimum Geyer ex Hook. Tauschia tenuissima (Geyer ex Hook.) Mathias & Constance Velaea tenuissima (Geyer ex Hook.) Drude |
| Territory | 7 Northern America 73 Northwestern U.S.A. (IDA Idaho, WAS Washington) |