| Lophion aduncum (Sm.) Nieuwl. & Lunell | Viola adunca Sm. sect. Viola |
| Lophion canadense (L.) Spach | Viola canadensis L. sect. Viola |
| Lophion rostratum (Muhl. ex Pursh) Nieuwl. | Viola rostrata Muhl. ex Pursh |
| Lophion striatum (Aiton) Nieuwl. | Viola striata Aiton |