This species has been reported as an escape, etc., in three counties. Hansen (Proc. Indiana Acad. Sci. 37: 320. 1928) says: "Specimens were collected in full flower near Winamac, where it is established along roadsides, on June 20, 1927." W. N. Clute informed me in 1936 that there is "a large colony along the canal in Indianapolis between Illinois and Meridian Streets." In 1937 I found it abundant over an area of 3 acres in a pasture about 3 miles southwest of Knox, Starke County. Leafy Spurge is a very obnoxious weed and spreads rapidly. Its roots penetrate the soil to a depth of 5-15 feet. On account of the acrid latex stock will not eat it. If a colony of this pest is discovered no amount of effort or expense should be spared in order to exterminate it.
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Indiana Coefficient of Conservatism: C = null, non-native
