Bryologist 81: 334 (1978). Type locality: USA, Alaska, Chugach Mts., Thompson Pass on Richardson Highway, 1967, T. Ahti & J. W. Thomson 24604 (H - holotype; CANL, WIS - isotype).
Type locality: USA, Alaska, Chugach Mts., Thompson Pass on Richardson Highway, 1967, T. Ahti & J. W. Thomson 24604 (H - holotype; CANL, WIS - isotype).