Photo 2538250, (c) Charles Willis, some rights reserved (CC BY-NC), uploaded by Charles Willis

Attribution © Charles Willis some rights reserved Uploaded by cgwillis Source iNaturalist Associated observations Photos / Sounds What Giant Ragweed (Ambrosia trifida) Observer cgwillis Date October 17, 2015 05:17 PM CDT Place 2100–2514 223rd Ave, Maquoketa, IA, US (Google, OSM) Date Added October 17, 2015 05:18 PM CDT Description Prairie Creek Nature Area 2 IDs Research Grade View Sizes small medium large original