Seeds are in small brown pods, 0.4 to 1.2 inches (1-3 cm) long, covered with silky, silvery to reddish gold hairs.Flowers are small and in clusters of 4-10 on ends of small branchlets.Leaves and young stems covered with silvery hairs.Older stems are brown and more or less round younger stems are green, ridged and very leafy.Large tap-rooted shrub with yellow, pea-type flowers and small oval leaves in groups of three.For more information see Noxious Weed Lists and Laws. It is on the King County list of Regulated Class A Noxious Weeds. Public and private landowners are required by state law to eradicate this plant when it occurs on their property. French broom is a Class A Noxious Weed in Washington due to its limited distribution in the state and the potential for significant impact to state resources. It was added to the state list in 2013. The only currently known escaped population of French broom in King County is on the south campus of the University of Washington near the Montlake Bridge. Already a widespread problem in northern California and on the move in Oregon, French broom has the potential to threaten grassland habitats and out-compete forage species in Washington and to become a serious pest plant. French broom closely resembles other broom species including two other noxious weeds, Scotch broom and Spanish broom. It is well-adapted to our climate of dry summers and mild winters and is capable of invading beyond where it is planted and out-competing other plant species. French broom is a European species originally introduced as an ornamental to North America.
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