|ODA rating: B and T
USDA Symbol: CYST7
Oregon Portuguese broom distribution
Other common names
striated broom and hairy-fruited broom.
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Images courtesy of Glenn Miller, Oregon Dept. of Agriculture
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Perennial; blooms April to June. Grows 3 to 10 ft tall. Evergreen shrub similar to Scotch broom except pods inflated and hairy all over, giving appearance of pussy willow buds. Stems more silvery, but difficult to distinguish until leaves and flowers fall off.
Portuguese broom is similar to Scotch broom in growth form except for two major differences: it grows much larger and lives longer. Infestations in Douglas county Oregon are highly competative in commercial timberland with the canopies of individual plants reaching almost 20' across.
Native to Europe, Portuguese broom was introduced to North America for landscaping and soil stabilization uses. Infestations occur in Douglas and Lane counties, Oregon. Escapees from cultivation will be prolific in savannahs, scrubs, and open forest.
Distribution in Oregon
Infestations are limited to two Oregon Counties: Douglas and Lane. The first known site was noted in Lane County in 1982.
Approved biocontrol agents have not been found to be effective in control of this plant due to its limited distribution and the presence of a parasitic wasp that feeds on it.