Wisteria floribunda
Common name: 
Japanese Wisteria
wis-TE-ri-a flo-i-bun-DA
Native to (or naturalized in) Oregon: 
  • Deciduous vine, climbs to 25 ft [8 m] or more, twines clockwise.   Leaves alternate, pinnately compound, 25-38 cm long, 13-19 leaflets, each 4-8 cm long, ovate-elliptic to ovate-oblong, acuminate, rounded at base, occasionally broad-wedge shaped, margin entire, bright green above.  Flowers violet, violet-blue, sometime white, slightly fragrant, 1.5-2 cm long, in slender clusters (racemes) 20-50 cm long, flowers tend to open gradually from the base to the apex; longer bloom period but less concentrated color than W. sinensis.  Fruit is a brown pod 10-15 cm long.
  • Sun to part shade.  Slow to establish
  • Hardy to USDA Zone (4) 5      Native to Japan.   Many cultivars, including doubles, and flowers that are white, pink, lavender, blue, or purple.
  • Caution: both Japanese and Chinese Wisteria (W. floribunda and W. sinensis) and their hybrids are reported to have invaded natural habitats throughout many eastern and southern States.
Click image to enlarge
  • plant habit, flowering

    plant habit, flowering

  • flower clusters

    flower clusters

  • leaf and flower cluster

    leaf and flower cluster

  • leaflets and flowers

    leaflets and flowers

  • plant habit, summer

    plant habit, summer

  • leaflets, comparison

    leaflets, comparison

  • winter twigs and buds

    winter twigs and buds

  • buds