Davis's Knotweed, Cascade Knotweed, Newberry's Fleeceflower: Aconogonon davisiae var. davisiae (Synonyms: Aconogonon davisiae, Aconogonum davisiae, Aconogonum davisiae var. glabrum, Aconogonum newberryi, Polygonum davisiae, Polygonum newberryi, Polygonum newberryi var. glabrum, Polygonum newberryi var. newberryi) -
Pokeweed Fleeceflower, Alpine Knotweed, Jimson Knotweed: Aconogonon phytolaccifolium var. phytolaccifolium (Synonym: Polygonum phytolaccifolium) -