Mexican fireweed USDA PLANTS Symbol: KOSC
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Kochia scoparia (L.) A.J. Scott

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Taxonomic Rank: Magnoliopsida: Caryophyllales: Chenopodiaceae
Synonym(s): kochia, mock cypress, mirabel, burningbush

Mexican fireweed is an annual weed that grows to 4 ft. (1.2m) tall. Leaves are gray-green, alternate, entire, ¼ - 2 ½ in. (5-60mm) long, up to ½ in. (10mm) wide and usually covered with small hairs. The upper leaves are sometimes glabrous. Flowering occurs in July to October. Flowers are apetaloid, sessile, inconspicuous and occur along spikes. The fruits are utricles that contain one flattened, 0.1 in. (2 mm) wide seed. Mexican fireweed is a native of Eurasia and occurs along roadsides, fields, and other disturbed places. In the winter, when the plants senesce, the plant breaks off at the base and tumbles in the wind, effectively spreading its seeds.

Identification, Biology, Control and Management Resources

Selected Images from Invasive.orgView All Images at Invasive.org


Plant(s);
John M. Randall, The Nature Conservancy, Bugwood.org
Additional Resolutions & Image Usage

Stem(s);
Douglas Barbe, California Department of Food and Agriculture, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
Additional Resolutions & Image Usage

Flower(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
Additional Resolutions & Image Usage

Plant(s);
Jan Samanek, State Phytosanitary Administration, Bugwood.org
Additional Resolutions & Image Usage

Seed(s);
Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org
Additional Resolutions & Image Usage

EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org
 


State(s) Where Reported invasive.
Based on state level agency and organization lists of invasive plants from WeedUS database.

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Invasive Listing Sources:
California Invasive Plant Council
California Invasive Plant Council
Connecticut Invasive Plant Working Group
Faith Campbell, 1998
Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
Pacific Northwest Exotic Pest Plant Council, 1998