American Bistort, Snakeweed, Mountain Meadow Knotweed, Western Bistort: Bistorta bistortoides (Synonyms: Persicaria bistortoides, Polygonum bistortoides, Polygonum bistortoides var. linearifolium, Polygonum bistortoides var. oblongifolium, Polygonum cephalophorum, Polygonum glastifolium, Polygonum vulcanicum) -
Viviparous Bistort, Alpine Bistort, Serpent-grass: Bistorta vivipara (Synonyms: Persicaria vivipara, Polygonum viviparum, Polygonum viviparum var. macounii) -