SS-AGR-314, a 2-page illustrated fact sheet by Brandon Fast, Jason Ferrell, and Brent Sellers, describes this common broadleaf weed found in pastures, cultivated fields, waste areas, and roadsides throughout Florida. Includes a tables detailing the efficacy of various herbicides at 2, 4, and 8 weeks, and approximate cost. Published by the UF Department of Agronomy, October 2008.
http://edis.ifas.ufl.edu/AG320