| Polygonaceae | |
Polygonum pensylvanicum fo. albineum
| Farw. | Pap. Michigan Acad. Sci. 2: 21 | 1923 |
| Polygonaceae | |
Polygonum pensylvanicum fo. albinum
| Fernald | Rhodora 47(556): 137 | 1945 |
| Polygonaceae | |
Polygonum pensylvanicum var. durum
| Stanford | Rhodora 27(322): 180 | 1925 |
| Polygonaceae | |
Polygonum pensylvanicum var. eglandulosum
| Myers | Castanea 7(4/5): 74–75 | 1942 |
| Polygonaceae | ** |
Polygonum pensylvanicum var. genuinum
| Fernald | Rhodora 19(220): 72 | 1917 |
| Polygonaceae | * |
Polygonum pensylvanicum fo. laevigatum
| Fernald | Rhodora 19: 73 | 1917 |
| Polygonaceae | |
Polygonum pensylvanicum var. laevigatum
| Fernald | Rhodora 19(220): 73 | 1917 |
| Polygonaceae | |
Polygonum pensylvanicum var. nesophilum
| Fernald | Rhodora 19(220): 73 | 1917 |
| Polygonaceae | |
Polygonum pensylvanicum subsp. oneilii
| (Brenckle) Hultén | Ark. Bot., n.s. 7(1): 47 | 1967 [1968] |
| Polygonaceae | |
Polygonum pensylvanicum fo. pallescens
| Stanford | Rhodora 27(322): 180 | 1925 |
| Polygonaceae | |
Polygonum pensylvanicum fo. pensylvanicum
| | | |
| Polygonaceae | |
Polygonum pensylvanicum subsp. pensylvanicum
| | | |
| Polygonaceae | |
Polygonum pensylvanicum var. pensylvanicum
| | | |
| Polygonaceae | |
Polygonum pensylvanicum var. rosiflorum
| Norton | Castanea 7(8): 126 | 1942 |