| Family | APIACEAE |
| Genus species | Cymopterus williamsii R.L.Hartm. & Constance |
| Bibliography | Brittonia 37: 91 (1985) |
| Native Range | Wyoming |
| Primary Biome | Temperate |
| Habitat | rocks |
| Altitude | 1800-2500m |
| Description | leaves pinnatipartite, glabrous, blue-grey, subcoriaceous, segments linear to narrowly lanceolate, flowers in capitate umbel, achenes glabrous, broadly elliptic to oval |
| Size | 5-10cm |
| Color | yellow |
| Bloom | late spring, 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 |
| Territory | 7 Northern America 73 Northwestern U.S.A. (WYO Wyoming) |
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