Archidaceae: Clay Earth-moss
- Description and illustrations of Archidium alternifolium.
- http://delta-intkey.com/britms/www/archidia.htm

Archidiaceae
- A monotypic family with a unique development of the sporophyte. Archidium, with 24 species is described and illustrated.
- http://www.dulwichrunners.org.uk/gba/arch.htm