Codoniaceae - Links to information about the specimens in the American Bryophyte Catalogue of The New York Botanical Garden. www.nybg.org/bsci/hcol/bryo/Codoniaceae.html
Petalophyllum ralfsii - A description of the habitat in which this species grows in Wales, along with a photograph of the gametophyte. home.clara.net/adhale/bryos/pralfsii.htm
