Persicaria bicornis (Raf.) Nieuwl. Persicaria bicornis (Raf.) Nieuwl. in Amer. Midl. Naturalist 3(7): 201. 1914 sec. Ulloa Ulloa & al. 2018=Persicaria longistyla (Small) Small, Fl. S.E. U.S.: 377. 1903 syn. sec. POWO 2019