Lacy Lomatium, Streambank Desert-parsley, Swale Desert Parsley: Lomatium ambiguum (Synonyms: Cogswellia ambigua, Peucedanum ambiguum) -
Narrowfruit Biscuit-root: Lomatium brevifolium (Synonyms: Lomatium triternatum var. alatum, Lomatium triternatum var. brevifolium, Lomatium triternatum var. macrocarpum) -
Columbia Desert Parsley, Columbia Gorge Desert-parsley, Columbia Lomatium, Purple Leptotaenia, Purple Lomatium: Lomatium columbianum (Synonym: Leptotaenia purpurea) -
Fern-leaf Desert Parsley, Fern-leaved Desert Parsley: Lomatium dissectum (Synonyms: Leptotaenia dissecta, Leptotaenia foliosa var. dissecta, Lomatium dissectum var. dissectum) -
Gorman's Desert-parsley, Gorman's Desert Parsley, Salt and Pepper: Lomatium gormanii (Synonyms: Lomatium gormaniipurpureum, Peucedanum confusum) -
Klickitat Biscuitroot, Klickitat Desert Parsley, Klickitat Lomatium: Lomatium klickitatense (Synonym: Lomatium grayi, in part) -
Great Basin Indian-potato, Linear-leaved Orogenia: Lomatium linearifolia (Synonyms: Orogenia linearifolia, Orogenia linearifolia var. lata) -
Biscuit Root, Bigseed Biscuitroot, Bigseed Lomatium, Gray-leaf Desert Parsley, Large-fruit Desert Parsley, Large-fruited Lomatium: Lomatium macrocarpum (Synonyms: Cogswellia macrocarpa, Ferula macrocarpa, Lomatium flavum, Lomatium macrocarpum var. artemisiarum, Lomatium macrocarpum var. ellipticum, Peucedanum macrocarpum) -
Cascade Desert-parsley, Coast Range Lomatium, Martindale's Desert Parsley, Mountain Parsley: Lomatium martindalei (Synonyms: Lomatium angustatum, Lomatium angustatum var. flavum, Lomatium martindalei var. angustatum, Lomatium martindalei var. flavum, Lomatium martindalei var. martindalei) -
Fern-leaf Desert Parsley, Fern-leaved Biscuit-root, Fern-leaved Desert Parsley, Fern-leaved Lomatium: Lomatium multifidum (Synonyms: Leptotaenia multifida, Lomatium dissectum var. eatonii, Lomatium dissectum var. multifidum) - In the Klickitat River canyon at least to near Grayback Mt.
Bare-stem Desert Parsley, Barestem Lomatium, Indian-consumption-potato, Pestle Parsnip: Lomatium nudicaule (Synonym: Cogswellia nudicaulis, Lomatium platyphyllum) -
Butterfly-bearing Biscuit-root, Butterfly-bearing Desert Parsley: Lomatium papilioniferum (Synonym: Lomatium grayi, in part) -
Piper's Desert Parsley, Piper's Lomatium, Salt-and-pepper: Lomatium piperi (Synonym: Cogswellia piperi) -
Suksdorf's Desert Parsley: Lomatium suksdorfii (Synonym: Cogswellia suksdorfii) -
Nine-leaf Mountain Parsley: Lomatium triternatum (Synonyms: Lomatium triternatum ssp. triternatum, Lomatium triternatum var. triternatum) - Potentially, all of this taxon west of eastern Oregon and Washington will included in Lomatium brevifolium.
Watson's Desert-parsley, Watson's Desert Parsley: Lomatium watsonii (Synonym: Lomatium frenchii) -