This has a widespread circumboreal range. It was discovered in RUSS during 2001 by Martina Hines of KSNPC (Clark et al. 2005). There are also 19th Century colls. from BATH/ROWA (PH; Campbell et al. 1992) and EDMO/WARR (KY; Pr, handwritten addenda). Based on historical clues, probable localities for these old records have been indicated in various technical reports (KSNPC).