Taxa: Persicaria amphibia (Polygonum amphibium, Polygonum bistorta, Polygonum bistorta var. bistorta, Polygonum coccineum var. terrestre, Polygonum natans, Persicaria muehlenbergii, Persicaria nebraskensis), Persicaria amphibia var. emersa (Persicaria coccinea, Polygonum muehlenbergii, Polygonum amphibium
... (show all) var. coccineum, Polygonum amphibium var. emersum, Polygonum coccineum, Polygonum coccineum var. pratincola), Persicaria amphibia var. stipulacea (Persicaria mesochora, Polygonum fluitans, Polygonum amphibium subsp. laevimarginatum, Polygonum amphibium var. hartwrightii, Polygonum amphibium var. stipulaceum, Polygonum coccineum var. rigidulum, Polygonum hartwrightii)