| Family | APIACEAE |
| Genus species | Cymopterus hallii (A.Gray) B.L.Turner |
| Bibliography | Sida, Bot. Misc. 24: 6 (2003) |
| Native Range | Colorado to sc. USA and ne. Mexico |
| Primary Biome | Subtropical |
| Habitat | rocks |
| Altitude | 1000-2300m |
| Description | leaves in outline oblong, 2-3-pinnatisect, ultimate segments linear to ovate, acute, rays of umbel 5-30mm, rigid, involucre absent, involucel bracts membranous, triangular |
| Size | 5-30cm |
| Color | yellow |
| Bloom | summer |
| Ca | |
| Type | perennial |
| Cultivation | sunny, dry, rock crevices, protection against winter wet alpine house, poor, drained soil, sun |
| Propagation | seed when ripe or as soon as possible |
| Synonyms | Aletes acaulis (Torr.) J.M.Coult. & Rose Aletes obovata Rydb. Carum hallii (A.Gray) S.Watson Deweya acaulis Torr. Musineon greenei A.Gray Oreosciadium acaule (Torr.) A.Gray Seseli hallii A.Gray Zizia hallii (A.Gray) J.M.Coult. & Rose |
| Territory | 7 Northern America 73 Northwestern U.S.A. (COL Colorado) 77 South-Central U.S.A. (NWM New Mexico, TEX Texas) 79 Mexico (MXE Mexico Northeast) |