Leccinum 'aurantiacum', associated with oak. Frances A. Crane Wildlife Management Area, Hatchville, Massachusetts, USA. 29 September 2010. Seen during the TDWG TechnoBioblitz. One of the many things I learned during the BioBlitz: Some people think that Leccinum aurantiacum occurs only in Europe, and what species this North American morphotype belongs to is not really clear.