Memoirs of The New York Botanical Garden
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of Vascular Plants of Northeastern United States and adjacent Canada
Details: Polytrichum piliferum Hedw.
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.
Polytrichum piliferum Hedw.
One isolated leaf with a hyaline awn, 1.60-1.75 m. Other leaves and plant fragments of Polytrichum were recovered, but poor preservation prevented further identification.