Phylum [Tracheophyta] Sinnott ex Caval.-Sm. (1998) - vascular plants Subphylum Lycopodiophytina Reveal (1996) [monotypic] Class Lycopodiopsida Bartl. (1830) Order Lycopodiales DC. ex Bercht. & J.Presl (1820) [monotypic] Family Lycopodiaceae P.Beauv. ex Mirb. (1802) - clubmosses Subfamily Lycopodioideae W. H. Wagner & Beitel ex B. Øllg. Genus Diphasium C.Presl. ex Rothm.