Monographs Details: Pogonatum urnigerum (Hedw.) P.Beauv.
Authority: 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.
Family:Polytrichaceae
Discussion:Two leaves, 1.60-1.75 m. The fossils are brittle, but a series of cross sections revealed the characteristic terminal cells of the lamellae, which have bulging-pentagonal lumina. Fig. 7g-i.