Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. March 2011. Scientific name: Hieracium pilosella L. Common name(s): mouseear hawkweed Link(s):  USDA PLANTS Profile Images: (to see enlargements [PC]: click on image, then right click and choose “view image”) Description: -perennial -leaves are simple alternate basal -considered