Text Size:   A+ A- A   •   Text Only
Find     
Site Image
butterfly bush (Buddleja davidii)
ODA rating: B
 
USDA Symbol: BUDA2
Oregon butterfly bush distribution
 
Other common names
summer lilac
 
Click on image to view larger photo.

Image courtesy of Tom Forney, Oregon Dept. of Agriculture. 
  Image courtesy of Glenn Miller, Oregon Dept. of Agriculture. 

Image courtesy of Glenn Miller, Oregon Dept. of Agriculture. 
 
If images are downloaded and used from the ODA web site please be sure to credit the photographer.
 
Description
Perennial shrub; flowers mid to late summer. Grows up to 10 feet tall. Leaves narrow, opposite and green to blue-gray. Flower heads lilac-like but come to a more definite point. Flowers small and purple.


Impacts
This plant is a pioneering species that dominates open habitats. It poses an ecological threat to dry-land meadows, open slopes and dunes, dominating these sites as much as Scotch broom has historically. It also invades reforested sites, resulting in a loss of forest productivity.
 
Introduction
Butterfly bush is native to northwestern China and Japan. Infestations have established on auto and railroad rights-of-way, in industrial yards and in riparian areas throughout western Oregon during the previous decade. It has been identified in forested areas of the Willamette National Forest and then in commercial timberland on Oregon’s south coast.


Distribution in Oregon

Biological controls
No approved biological control agent is available.