Huperzia appressa
 Huperzia appressa (common name Appalachian firmoss) is a non-flowering plant in the Lycopodiaceae. It has been reported from the United States Canada China Russia and several European countries. It is a terrestrial plant up to 10 cm tall with dichotomously branched stems.Huperzia appressa (Desv.) Á. Löve & D. Löve Bot. Not. 114: 34. 1961. = Lycopodium selago L. var. appressum Desv. Mém. Soc. Linn. Paris 6(2): 180. 1827