Jeff Gunsolus, Extension Agronomist - Weed Science Photo 1. Palmer amaranth plant from Yellow Medicine County, MN. Photo: Bruce Potter Following yesterday’s confirmation of the presence of Palmer Amaranth (Amaranthus palmeri) in Yellow Medicine County, University of Minnesota Extension and the Minnesota Department of Agriculture (MDA) sent out a joint news release describing where this plant was detected, photos to assist in identification, the biological reasons why this weed is on the MDA’s Prohibited – Eradicate Noxious Weed list and why efforts to eradicate this weed are critical to Minnesota’s commodity crop producers.