| Lomatium ambiguum | Wyeth Biscuitroot | Apiaceae | Homotypic Synonyms: Cogswellia ambigua (Nutt.) M.E.Jones. Eulophus ambiguus Nutt. Peucedanum ambiguum (Nutt.) Nutt. Heterotypic Synonyms: Peucedanum abrotanifolium Nutt. Peucedanum ambiguum var. leptocarpum J.M.Coult. & Rose | 4 | 1 |
| Lomatium bicolor | Wasatch springparsley | Apiaceae | Homotypic Synonyms: Cogswellia bicolor (S.Watson) M.E.Jones. Peucedanum bicolor S.Watson. Heterotypic Synonyms: Peucedanum bicolor var. gumbonis M.E.Jones. | 4 | 2 |
| Lomatium canbyi | Biscuitroot, Canby's biscuitroot | Apiaceae | | 4 | 0 |
| Lomatium cous | Cous biscuitroot, Biscuitroot | Apiaceae | L. montanum. Coult.&Rose. | 5 | 0 |
| Lomatium dissectum | Carrotleaf biscuitroot, Fernleaf Biscuitroot | Apiaceae | Leptotaenia dissecta. Nutt. Leptotaenia multifida. Nutt. | 2 | 2 |
| Lomatium eurycarpum | | Apiaceae | | 2 | 0 |
| Lomatium farinosum | Northern Biscuitroot, Hamblen's biscuitroot | Apiaceae | | 3 | 0 |
| Lomatium foeniculaceum | Desert Biscuitroot | Apiaceae | Cogswellia foeniculacea (Nutt.) J.M.Coult. & Rose. Ferula foeniculacea Nutt. Pastinaca foeniculacea (Nutt.) Spreng. Peucedanum foeniculaceum (Nutt.) Nutt. | 5 | 0 |
| Lomatium gayeri | Biscuitroot | Apiaceae | | 4 | 0 |
| Lomatium gormanii | Gorman's biscuitroot | Apiaceae | | 3 | 0 |
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