Polygonum ramosissimum var. autumnale (Brenckle) Brenckle

Polygonum ramosissimum var. autumnale (Brenckle) Brenckle is a synonym sensu FNA Ed. Comm., 2005 of:

Polygonum ramosissimum subsp. prolificum (Small) Costea & Tardif, an accepted subspecies name sensu FNA Ed. Comm., 2005.