Polytrichaceae is a common family of
mosses. Members of this family tend to be larger than other mosses with a thickened central stem and a
rhizome. The leaves have a midrib that bears
photosyntheticlamellae on the upper surface. Species in this group are
dioicous. Another characteristic that identifies them is that they have from 32 to 64
peristome teeth in their
sporangium.
^Goffinet, B.; W. R. Buck & A. J. Shaw (2008). "Morphology and Classification of the Bryophyta". In Bernard Goffinet & A. Jonathan Shaw (eds.). Bryophyte Biology (2nd ed.). Cambridge: Cambridge University Press. pp. 55–138.
ISBN9780521872256.
^Goffinet, Bernard; William R. Buck (2004). "Systematics of the Bryophyta (Mosses): From molecules to a revised classification". Monographs in Systematic Botany. Molecular Systematics of Bryophytes. 98. Missouri Botanical Garden Press: 205–239.
ISBN1-930723-38-5.
^Knowlton, F.H. (1926). "Flora of the Latah Formation of Spokane, Washington, and Coeur d'Alene, Idaho".
Shorter contributions to general geology, 1925(PDF) (Report). Professional Paper. Vol. 140. United States Geological Survey. pp. 17–55, plates VIII-XXXI.
doi:
10.3133/pp140A.