| Author | Thunberg | |
| Distribution | Mostly in the Mountains; scattered in the Piedmont; rare in the Sandhills region of the Coastal Plain. Specimens from Randolph, Wake, and Watauga counties are from cultivated plants.
Native of Japan; in N.A. MA to OH south to NC; LA, WA. | |
| Abundance | Rare. | |
| Habitat | Along streams, mixed disturbed woods, trailside, seedlings in campus bed. | |
| Phenology | Flowering and fruiting in NC -- no data. | |
| Identification | This species is very similar to the native I. vomitoria in leaf shape, size, and crenate margins, but the leaf tip is obtuse or acute and has a sharp tooth (vs. notched or retuse and has a small mucro in the notch). The fruits are black (vs. red in I. vomitoria). | |
| Taxonomic Comments | | |
| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
