Japanese wisteria USDA PLANTS Symbol: WIFL
U.S. Nativity: Exotic
Habit: Vines
Wisteria floribunda (Willd.) DC.

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Taxonomic Rank: Magnoliopsida: Fabales: Fabaceae (Leguminosae)
Native Range: Japan (REHD); temp. Asia, Japan (GRIN);

Japanese wisteria is a deciduous, woody vine capable of growing to a height of 35 ft. (10.7 m). Stems can be up to 10 in. (25.4 cm) in diameter, with smooth, tight gray to white bark. Alternate, pinnately compound leaves (13-19 leaflets) are tapered at the tip with wavy edges. Leaflets are up to 12 in. (30 cm) in length. Lavender, pink or white flowers are fragrant, very showy and abundant and occur in dangling clusters in the spring. Flowers clusters are 9-20 in. (22.9-50.8 cm) long. Seeds are contained within brown, hairy, flattened, bean-like pods. Although seeds are viable, vegetative growth is the primary method of spread for this invasive. Invasions often occur around previous plantings. Japanese wisteria can displace native vegetation and kill trees and shrubs by girdling them. The vine has the ability to change the structure of a forest by killing trees and altering the light availability to the forest floor. A native of Japan, it was first introduced into North America around 1830 for ornamental purposes.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Infestation;
John D. Byrd, Mississippi State University, Bugwood.org
Additional Resolutions & Image Usage

Infestation;
John D. Byrd, Mississippi State University, Bugwood.org
Additional Resolutions & Image Usage

Damage; Large vines (one with English ivy growing on it) girdling pines. Greenville, SC
Randy Cyr, Greentree, Bugwood.org
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Plant(s);
J. Scott Peterson, USDA NRCS PLANTS Database, Bugwood.org
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Seed(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

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U.S. National Parks where reported invasive:
Blue Ridge Parkway (North Carolina)
Chesapeake and Ohio Canal National Historical Park (Maryland, Washington, D.C., and West Virginia)
Colonial National Historical Park (Virginia)
Great Smoky Mountains National Park (North Carolina & Tennessee)
Kings Mountain National Military Park (South Carolina)
National Capital Parks East (Washington, D.C.)



Invasive Listing Sources:
Faith Campbell, 1998
Georgia Exotic Pest Plant Council
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
Maryland Cooperative Extension Service.  2003. Invasive Plant Control in Maryland. Home and Garden Information Center, Home and Garden Mimeo HG88. 4 pp.
Maryland Department of Natural Resources, 1994
Mid-Atlantic Exotic Pest Plant Council, 2005
New Jersey Department of Agriculture, Division of Plant Industry, 2004
Pennypack Ecological Restoration Trust, Pennsylvania.
South Carolina Exotic Pest Plant Council
Tennessee Exotic Pest Plant Council
Virginia Department of Conservation and Recreation, 2009