Compiled from a USDA Plants search on Dec 24, 2011. Presumed to be comprehensive.

Clubmosses and Firmosses - Photo (c) Alexander Wünsche, some rights reserved (CC BY-NC), uploaded by Alexander Wünsche Check list for Clubmosses and Firmosses (Order Lycopodiales)
Source: USDA, NRCS. 2011. The PLANTS Database (, 24 December 2011). National Plant Data Team, Greensboro, NC 27401-4901 USA. (Link)
kueda Added by kueda on December 24, 2011