| Author | (Willdenow) de Candolle | |
| Distribution | Scattered across the state. Website editors have not checked the ID of these specimens. It is likely that a few of these collections may be W. x formosa, a hybrid cultivar between Japanese and Chinese (W. sinensis) Wisterias. See Weakley (2018) for information.
Native of Japan; in N.A. ME to IL, south to FL and LA. | |
| Abundance | Apparently rare to uncommon. | |
| Habitat | Roadside wooded margins, urban and suburban street margins, wooded margins on campuses, edge of parking lot, behind motel at woods edge, maritime forest. Can cause tree mortality via constriction and/or via weighing it down. | |
| Phenology | Flowering April-July; fruiting July-November. | |
| Identification | Japanese Wisteria is a high-climbing vine with tough woody stems that wind around trunks and poles. There are 7-17 leaflets per leaf; the flowers open gradually from the base to the tip of raceme, versus 7-11 leaflets and all flowers open about simultaneously in Chinese Wisteria (W. sinensis). | |
| Taxonomic Comments | See Weakley (2018) for information on the hybrid cultivar.
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| Other Common Name(s) | | |
| State Rank | SE | |
| Global Rank | GNR | |
| State Status | | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
