The Genus Perideridia
Bolander's Yampah: Perideridia bolanderi ssp. bolanderi -
Red Root Yampah: Perideridia erythrorhiza -
Gairdner's Yampah, Gardner's Yampah, Western False Caraway: Perideridia gairdneri ssp. borealis (Synonym: Perideridia montana) -
Howell's False Caraway: Perideridia howellii -
Oregon Yampah, Eppaw: Perideridia oregana -