Scotch broom

Cytisus scoparius (L.) Link

Description from Invasive.org

Appearance
Cytisus scoparius is a perennial shrub that grows on average from 3.3-9.8 ft. (1-3 m) tall, but can reach to 13 ft. (4 m). The stems are five-angled and remain green all year.
Foliage
Leaves are small, alternate and compound with 3 leaflets. The leaves are often not noticeable, due to the dark green stems.
Flowers
The flowers are bright yellow, resemble sweet pea flowers, and occur singly or in pairs in the upper leaf axils. They bloom from late May to June.
Fruit
Seed pods are fuzzy on the edges, 1-2 in. (2.5-5 cm) long, and will explode when mature forcefully expelling the seeds. The seeds are small and multi-colored, ranging from green to brown to reddish brown.
Ecological Threat
Cytisus scoparius occurs along roadsides, coastal sites, disturbed sites, pastures, and dry scrubland. Its nitrogen fixing ability allows it to compete successfully on poor, dry, sandy soils. It grows well in full sun. It has been considered a pest weed since the 1920’s on the West Coast. Cytisus scoparius is native to western and central Europe. It was introduced into the United States as an ornamental in the early 1800s.

Resources

Selected Images from Invasive.org

View All Images at Invasive.org


Plant(s)
Eric Coombs, Oregon Department of Agriculture, Bugwood.org
Additional Resolutions & Image Usage
Foliage
Tom Heutte, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage
Fruit(s) Growing to 1.5 m in height. Flowers May to June. Common on sandy soils. Poland
Gil Wojciech, Polish Forest Research Institute, Bugwood.org
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Flower(s) yellow and red color morph
Eric Coombs, Oregon Department of Agriculture, Bugwood.org
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Flower(s)
Utah State University , , Bugwood.org
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Plant(s) in flower
Steve Dewey, Utah State University, Bugwood.org
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Fruit(s) Seed pods
William M. Ciesla, Forest Health Management International, Bugwood.org
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Twig(s)/Shoot(s) bud
Robert Vidéki, Doronicum Kft., Bugwood.org
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Seed(s)
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
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Seed(s)
Suzanne Foster, USDA NRCS PLANTS Database, Bugwood.org
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Plant(s) Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 2: 350.
USDA NRCS PLANTS Database , USDA NRCS PLANTS Database, Bugwood.org
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Plant(s)
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage
Plant(s)
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage
Plant(s)
Tom Heutte, USDA Forest Service, Bugwood.org
Additional Resolutions & Image Usage
Infestation
Eric Coombs, Oregon Department of Agriculture, Bugwood.org
Additional Resolutions & Image Usage

Distribution