Phylloglossum is a genus in the clubmoss family Huperziaceae. It is a small plant that superficially resembles a small grass plant. Phylloglossum was previously classified variously in the family Lycopodiaceae or in its own family the Phylloglossaceae. However due to recent genetic evidence Phylloglossum demonstrates that it is most closely related to the genus Huperzia and is a sister clade to the genus Phlegmariurus. The only species in Phylloglossum is drummondii (Eichhorn, 2005).