Bolander's Yampah, Olsi: Perideridia bolanderi ssp. bolanderi -
Red Root Yampah: Perideridia erythrorhiza -
Gairdner's Yampah, Gardner's Yampah, Mountain Yampah, Western False Caraway: Perideridia gairdneri ssp. borealis (Synonyms: Atenia montana, Carum garrettii, Carum montanum, Perideridia gairdneri, Perideridia gairdneri var. montana, Perideridia lemmonii, Perideridia montana) - This species is considered as Perideridia montana in Washington.
Howell's False Caraway: Perideridia howellii -
Eppaw, Oregon Yampah: Perideridia oregana (Synonyms: Atenia oregana, Carum oregana) -