Revista Inst. Café São Paulo: 36 (2010).

Protolog: Data lacking.

Protolog type data: Typ. CANADA. ALBERTA. 1 mi SE Gap, 51°03'N, 11.5°15'W, Populus tremuloides - P. balsamifera woods, 4250 ft. on P. balsamifera, 7 June 1972, R. A. Kalgutkar 1169 (PMAE - holotype).

Type locality: Canada, Alberta, 1 mi SE Gap, Populus tremuloides - P. balsamifera woods, on P. balsamifera, 1420 m, 7 June 1972, R. A. Kalgutkar 1169 (PMAE - holotype).

Type locality coordinates: 51°03'N, 11.5°15'W.