Tall Bugbane: Cimicifuga elata (Synonyms: Actaea elata, Cimicifuga elata var. alpestris, Cimicifuga elata var. elata) - Petals lacking. Branches of the panicle much elongated.
Cut-leaf Bugbane, Cut-leaved Bugbane, Mount Hood Bugbane: Cimicifuga laciniata (Synonym: Actaea laciniata) - Petals generally present. Branches of the panicle not much elongated.