Lythrum (Purple loosestrife) has been planted as an ornamental plant for many years and is still in many flower beds.  To help homeowners replace their Lythrum, Cass County Weed Control, the cities of Fargo and West Fargo have conducted Liatrus for Lythrum plant exchanges.  Every year in mid-July Litarus, a native prairie flower, is made available for homeowners who dig up and bring in their Lythrum plants.  A Liatrus is given for each Lythrum brought in.  So far, over 2500 Lythrum plants have been removed in the cities and county.