Click on the image below to enlarge it and download a high-resolution
JPEG file. Robert H. Mohlenbrock. USDA SCS. 1991. Southern wetland flora: Field office guide to plant species. South National Technical Center, Fort Worth. Courtesy of USDA NRCS Wetland Science Institute. Usage Requirements.
Threatened and Endangered Information: Conyzacanadensis (L.) Cronquist
The related entity italicized and indented below is listed by the U.S. federal government or a state. Common names are from state and federal lists.
Click on a place name to get a complete protected plant
list for that location.
U.S. Weed Information: Conyzacanadensis (L.) Cronquist
horseweed horseweed fleabane mares tail
This plant can be weedy or invasive according to the authoritative sources noted below. This plant
may be known by one or more common names in different
places, and some are listed above. Click on an acronym
to view each weed list, or click here for a
composite list of Weeds of the U.S.
Stubbendieck, J., G.Y. Friisoe, & M.R. Bolick.
1994.
Weeds of Nebraska and the Great Plains.
Nebraska Department of Agriculture, Bureau of Plant Industry.
Lincoln, Nebraska.
589pp.
Whitson, T.D. (ed.) et al.
1996.
Weeds of the West.
Western Society of Weed Science in cooperation with Cooperative Extension Services, University of Wyoming.
Laramie, Wyoming.
630pp.
This plant is introduced to the United States
from another country or countries. Click on link below for a
partial or complete list of U.S. introduced plants.