| Description | Asclepias viridiflora at Wind Cave National Park, South Dakota, USA |
| Date | 29 June 2007 |
| Source | http://www.nps.gov/wica/photosmultimedia/photo%2Dgallery%2Dwildflowers%2Ehtm?eid=133238&aId=168&root_aid=168&sort=title&startRow=46#e_133238 |
| Author | Jim Pisarowicz |
| Permission | Public Domain |
| Licensing | This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain. |
From Wikimedia Commons http://commons.wikimedia.org/