Vascular Plants of North Carolina
Account for Japanese Wisteria - Wisteria floribunda   (Willdenow) de Candolle
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Section 6 » Order Fabales » Family Fabaceae
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Author(Willdenow) de Candolle
DistributionScattered 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.
AbundanceApparently rare to uncommon.
HabitatRoadside 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.
PhenologyFlowering April-July; fruiting July-November.
IdentificationJapanese 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 CommentsSee Weakley (2018) for information on the hybrid cultivar.

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State RankSE
Global RankGNR
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