Pterobryaceae - Description of this highly diverse family containing 16 genera and circa 200 species. - http://www.efloras.org/florataxon.aspx?flora_id=50&taxon_id=10741
Family: Pterobryaceae - Description of the family and its 5 genera and photographic images of Henicodium geniculatum. - http://atrium.andesamazon.org/browse_taxonomy.php?type=family&id=474