Photo 13972, (c) Ken-ichi Ueda, some rights reserved (CC BY)

Attribution © Ken-ichi Ueda some rights reserved Uploaded by kueda Source Flickr Original http://www.flickr.com/photos/18024068@N00/4570492284 Associated observations Photos / Sounds What California Thistle (Cirsium occidentale var. californicum) Observer kueda Date May 1, 2010 03:33 PM PDT Place Merced River Trail, Mariposa County, CA, USA (Google, OSM) Date Added May 2, 2010 12:45 AM PDT 2 IDs Research Grade View Sizes small medium large original Copyright Ken-ichi Ueda