They are subglabrous above, pubescent beneath.įlowers are borne in subcapitate racemes, unlike Cytisus scoparius. The leaflets are more or less obovate, entire and 1 2 cm long. The leaves are trifoliolate with petioles 3-5 mm long. These pods are compressed, several seeded, with a callous appendage or strophiole near the base (Munz and Keck 1973).įrench broom: Perennial shrubs, 1-3 meters high with villous branchlets. The brownish black pods, 3.5 to 5 cm long, are villous on the margins only. The flaring calyx is glabrous, about 7 mm long and is two lipped with short teeth. The glabrous banner is ovate to rounded wings are oblong to ovate and the keel is straight or curved. Unlike French or Spanish broom, the yellow flowers of Scotch broom are usually borne solitary in axils, blooming between April and June. The leaflets are obovate to oblanceolate, entire, strigose and 6 12 mm long. The leaves are trifoliolate with petioles 2 10 mm long. 1951) are strongly angled (Hitchcock and Cronquist 1973) and appear naked or almost so (Munz and Keck 1973). The shrubs are 1 2 meters high and deciduous. Scotch broom: Also referred to as Sarothamnus scoparius, this weed is a perennial shrub of the Fabaceae (Leguminosae) family. Scientific Names: Cytisus scoparius and Cytisus monspessulanusĬommon Names: Scotch Broom and French Broom It was introduced into the United States as an ornamental in the early 1800s. Cytisus scoparius is native to western and central Europe. It has been considered a pest weed since the 1920’s on the West Coast. Its nitrogen fixing ability allows it to compete successfully on poor, dry, sandy soils. Ecological Threat Cytisus scoparius occurs along roadsides, coastal sites, disturbed sites, pastures, and dry scrubland. The seeds are small and multi-colored, ranging from green to brown to reddish brown. (2.5-5 cm) long, and will explode when mature forcefully expelling the seeds. Fruit Seed pods are fuzzy on the edges, 1-2 in. Flowers The flowers are bright yellow, resemble sweet pea flowers, and occur singly or in pairs in the upper leaf axils. The leaves are often not noticeable, due to the dark green stems. Foliage Leaves are small, alternate and compound with 3 leaflets. The stems are five-angled and remain green all year. We comply with the Federal Trade Commission 1998 Children’s Online Privacy Protection Act (COPPA).Scotch broom, Scottish broom, English broom, scotchbroom Overview Appearance Cytisus scoparius is a perennial shrub that grows on average from 3.3-9.8 ft. The 4-H Name and Emblem have special protections from Congress, protected by code 18 USC 707. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned. This information is for educational purposes only. Quentin Tyler, Director, MSU Extension, East Lansing, MI 48824. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. MSU is an affirmative-action, equal-opportunity employer, committed to achieving excellence through a diverse workforce and inclusive culture that encourages all people to reach their full potential. Portions of these bulletins are posted at Greg Lang's Fruit Bud Hardiness page at the MSU Horticulture Department. Sweet cherries - WSU EB 1128, Tart cherries - MSU Research. These numbers were taken from WSU and MSU Extension Bulletins. Sweet cherries Critical spring temperatures for sweet cherries Tart cherries Critical spring temperatures for tart cherries
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