Genus Polytrichum (Haircaps) - http://www.perspective.com/nature/plantae/polytrichum.html Photographic images of this easily identified moss.
Polytrichales - http://home.manhattan.edu/~frances.cardillo/plants/nonvas/poly.html A description of the order.
Polytrichum juniperinum - http://www-biol.paisley.ac.uk/bioref/Bryophyta/Polytrichum_juniperinum.html Description and good photographic images of this species which has a worldwide distribution.
Polytrichum commune - http://www-biol.paisley.ac.uk/bioref/Bryophyta/Polytrichum_commune.html Description and good photographic images of this species which has a worldwide distribution.
Polytrichum commune - http://home.clara.net/adhale/bryos/pcommune.htm A description of the habitat in which this species grows in Wales, along with a photograph of the gametophyte.
Atrichum undulatum - http://bryophytes.plant.siu.edu/aundulatum.html Image from Illinois.
Atrichum angustatum - http://bryophytes.plant.siu.edu/atrichum.html Image from Illinois.
Polytrichum ohioense - http://bryophytes.plant.siu.edu/polypic.html Photograph taken in Illinois.
Polytrichum juniperinum - http://bryophytes.plant.siu.edu/pjuniperinum.html Photographs taken in Illinois.
Polytrichum commune - http://bryophytes.plant.siu.edu/pcommune.html Photographs taken in Illinois.
Polytrichum piliferum - http://bryophytes.plant.siu.edu/ppiliferum.html Photograph taken in Utah.
Pogonatum macrophyllum - http://bryophytes.plant.siu.edu/pmacrophyllumpic.html Photograph taken in Malaysia.
Polytrichum ohioense - http://vis-pc.plantbio.ohiou.edu/moss/Polytrichum.html Photographs of the gametophyte and a microscopic image of a leaf tip and capsule.
Hairy Cap Moss - http://botit.botany.wisc.edu/images/130/Bryophytes/Bryophyta/Hairy_cap_moss/ Photographs of Polytrichum species.
Polytrichum - http://botit.botany.wisc.edu/images/130/Bryophytes/Bryophyta/Hairy_cap_moss/Polytrichum_.html Photograph of gametophytes and sporophytes.
Antheridia - http://botit.botany.wisc.edu/images/130/Bryophytes/Bryophyta/Hairy_cap_moss/Male_MC.html An image of male Polytrichum plants.
Operculum - http://botit.botany.wisc.edu/images/130/Bryophytes/Bryophyta/Hairy_cap_moss/Polytrichum_operculum_.html Photograph of an operculum of a Polytrichum species.
Polytrichum juniperinum - http://www.helsinki.fi/~korpela/polytrichum_juniperinum.html A photographic image.
Polytrichum commune - http://www.helsinki.fi/~korpela/polytrichum_commune.html A photographic image.
Family Polytrichaceae - http://www.hiddenforest.co.nz/bryophytes/mosses/familys/polytrichaceae/polytrichaceae.htm Photographic images of several genera, including Dawsonia superba, the world’s tallest moss.
Polytrichum piliferum - http://www.helsinki.fi/~korpela/polytrichum_piliferum.html A photographic image.
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