Photographer: D.F. Costello
Manager: <a href='http://www.nal.usda.gov/'>National Agricultural Library</a>. Originally from <a href='http://www.fs.fed.us/'>US Forest Service</a>. United States, CO. 1937.
Notes: <p>This image is not copyrighted and may be freely used for any purpose. Please credit the artist, original publication if applicable, and the USDA-NRCS PLANTS Database. The following format is suggested and will be appreciated:</p> <p>D.F. Costello @ USDA-NRCS PLANTS Database</p> <p>If you cite PLA