Polytrichum
Antheridia, Hairy Cap Moss, Operculum, Polytrichum, Polytrichum, Polytrichum (Haircaps), Polytrichum commune, Polytrichum commune, Polytrichum commune, Polytrichum formosum
Atrichum oerstedianum
A photograph showing hydrated and dried (curled) shoots.
Polytrichaceae
Links to information about the specimens in the American Bryophyte Catalogue of The New York Botanical Garden.
Polytrichales
A description of the order.