References
- Dixon, H. N. (1924). Student's Handbook of British Mosses, ed. 3. Eastbourne.
- Nyholm, E. (1954-69). Illustrated Moss Flora of Fennoscandia. II. Musci. Lund.
- Vitt, D.H. (1973). Revision of the genus Orthotrichum in North America, north of Mexico. Bryophytorum Biblthca. J. Cramer, Vaduz and Lehre.