|Russian-thistle|| USDA PLANTS Symbol: SATR12
U.S. Nativity: Exotic
|Salsola tragus L.|
Jump to: Resources | Images | Distribution Maps | Sources
Taxonomic Rank: Magnoliopsida: Caryophyllales: Chenopodiaceae
|Synonym(s): prickly Russian thistle|
|Native Range: Africa, temp.& trop. Asia, Europe (GRIN)|
Russian thistle is an annual herb that can grow to 4 ft. (1.2 m) tall. It was introduced into the United States in the mid 1870s, possibly as a contaminant in flax seed. Leaves are alternate and narrow. Upper leaves have a sharp point at the apex and are 1.3-2 in. (3-5 cm) long. Flowering occurs from midsummer to fall, when small, pink to greenish flowers develop from the leaf axils. Each flower is subtended by 3, spine-tipped leaves. After the plant matures it detaches from the root system and tumbles in the wind, spreading seed (like another common name “tumbleweed” suggests).
Identification, Biology, Control and Management Resources
|Selected Images from Invasive.org||View All Images at Invasive.org|
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.
|Invasive Listing Sources:|
|California Invasive Plant Council|
|Faith Campbell, 1998|
|Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007|
|Pacific Northwest Exotic Pest Plant Council, 1998|