Polytrichum piliferum Hedw.
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Floras and Monographs
Polytrichum piliferum Hedw.: [Article] Buck, William R. 1987. Bryostephane Steereana: A Collection of Bryological Papers Presented to William Campbell Steere On The Occasion of His 80th Birthday. Mem. New York Bot. Gard. 45: 1-749.