C. concolor is sometimes more green when wet or in the center of large old thalli, which are less commonly seen in NYC. Reference: http://www.wisconsinmushrooms.com/CandelariaConcolor.html
Kelly L. O'Donnell
2018-04-00
2018/04/30 6:53 PM EDT
United States of America, New York, Central Park, New York, NY, USA