Photo 706951, (c) Aaron Carlson, some rights reserved (CC BY), uploaded by Aaron Carlson

Attribution © Aaron Carlson some rights reserved Uploaded by aarongunnar Source Flickr Original http://www.flickr.com/photos/59003943@N00/9669451896/ Associated observations Photos / Sounds What Mat Sandbur (Cenchrus longispinus) Observer aarongunnar Date September 1, 2013 06:11 PM CDT Place Sterling Barrens State Natural Area (Google, OSM) Date Added March 5, 2014 10:24 PM CST Description Sterling Barrens State Natural Area, Polk Co., WI A very painful little grass. 2 IDs Research Grade View Sizes small medium large original