Archidium

Archidium is a genus of mosses; it is the only genus in the family Archidiaceae and order Archidiales. Historically, they were considered the only genus in the subclass Archidiidae Engl.

Classification
The genus Archidium includes 35 species (this list may be incomplete):
 * Archidium acanthophyllum
 * Archidium alternifolium
 * Archidium andersonianum
 * Archidium donnellii
 * Archidium elatum, Dixon & Sainsbury
 * Archidium hallii
 * Archidium minus
 * Archidium minutissimum
 * Archidium muellerianum
 * Archidium ohioense
 * Archidium stellatum
 * Archidium tenerrimum
 * Archidium wattsii