| 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) |
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| 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. |
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Identification, Biology, Control and Management Resources
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| Selected Images from Invasive.org | View 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 Additional Resolutions & Image Usage |
 Plant(s); J. Scott Peterson, USDA NRCS PLANTS Database, Bugwood.org Additional Resolutions & Image Usage |
 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 Alternative content
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 State(s) Where Reported invasive. Based on state level agency and organization lists of invasive plants from WeedUS database. Alternative content
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