The family Huperziaceae is one of two families sometimes recognized in the order Lycopodiales, and contains two or three extant genera:

• Huperzia (temperate firmosses); 10-15 species; terrestrial.
• Phlegmariurus (tropical firmosses); about 300-400 species; often included in Huperzia; mainly epiphytes.
• Phylloglossum (Pygmy Clubmoss); formerly thought to be only distantly related to Huperzia. This is a terrestrial, grass-like plant with basal, 2-5 cm long, fleshy leaves. The only listed species is Phylloglossum drummondii.

The family Huperziaceae is one of two families sometimes recognized in the order Lycopodiales, and contains two or three extant genera:

• Huperzia (temperate firmosses); 10-15 species; terrestrial.
• Phlegmariurus (tropical firmosses); about 300-400 species; often included in Huperzia; mainly epiphytes.
• Phylloglossum (Pygmy Clubmoss); formerly thought to be only distantly related to Huperzia. This is a terrestrial, grass-like plant with basal, 2-5 cm long, fleshy leaves. The only listed species is Phylloglossum drummondii.