Horseweed
Fall (top) and spring (bottom) germinating horseweed plants in mid-April. (Bob Hartzler)
This image appears in the following article:
Horseweed
[1]
Source URL:
http://www.ipm.iastate.edu/ipm/icm//ipm/icm/node/408
Links:
[1] http://www.ipm.iastate.edu/ipm/icm/2006/4-24/horseweed.html
