- Sonchus arvensis is a perennial herbaceous plant. Stems can reach 4.9 ft. (1.5 m) in height and contain milky sap.
- Leaves are sessile, alternate, clasping, up to 12 in. (30.5 cm) long and decrease in size further up the stem, margins undulate with sharp spines.
- Flowering occurs in June to October, when yellow, tight, dandelion-like flower heads develop at the tips of the branches. Flowers open 2-3 hours after sunrise and close about noon.
- Fruits are reddish, ribbed and have a tuft of hair at the top.
- Ecological Threat
- Sonchus arvensis occurs along roadsides, railroads and other disturbed habitat. It is native to Eurasia.
- Federal Noxious Weed Disseminules of the U.S. - USDA-APHIS
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EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org
State Invasive List - This map identifies those states that list this species on their invasive species list. For more information, visit Invasive.org
Invasive Listing Sources
- Alaska Noxious Weeds
- Arizona Noxious Weeds
- California Noxious Weeds
- Colorado Noxious Weeds
- Faith Campbell, 1998
- Idaho Noxious Weeds
- Illinois Noxious Weeds
- Jil M. Swearingen, Survey of invasive plants occurring on National Park Service lands, 2000-2007
- Michigan Noxious Weeds
- Minnesota Noxious Weeds
- Nevada Noxious Weeds
- Nonnative Invasive Species in Southern Forest and Grassland Ecosystems
- South Dakota Noxious Weeds
- Tennessee Exotic Pest Plant Council
- WeedUS - Database of Plants Invading Natural Areas in the United States
- Wyoming Noxious Weeds
|Common Name Reference:|| USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|
|Scientific Name Reference:||USDA, NRCS. 2010. The PLANTS Database. National Plant Data Center, Baton Rouge, LA, USA.|