Family: Lycopodiaceae
Genus: Diphasiastrum
 

Identification

" Horizontal stems on substrate surface or shallowly buried in liiter, 1.1-2.2 mm wide ; leaves appressed, linear to narrowly lanceolate, 1.4-4 * 0.5-1.2 mm, apices acute. Upright shoots 8-44 cm, branching irregularly successively to 5 times; leaves on upright main stem appressed with decurrent base, narrowly lanceolate, 1.2-3.2 * 0.5-1.1 mm, apex acute to acuminate. Branchlets flat in cross section, narrowly bladelike, 1.8 - 4 mm wide, annual bud constrictions abrupt and conspicuous; upperside green, faintly shiny, flat; underside dull, pale, flat. Leaves on branchlets 4-ranked; upperside leaves appressed, linear lanceolate, free portion of blades 0.7 - 2 * 0.5 - 1.2 mm; lateral leaves appressed, 2.6 - 7.3 * 0.8 - 2.1 mm; underside leaves weakly developed, appressed, narrowly deltate, 0.7-1.5 * 0.4-0.9 cm. Peduncles 1-2 on each upright shoot. Stalks forked at uniform distance.  Strobili1-2, apex blunt, sterile tip absent. Sporophylls broadly delicate to nearly cordate ". (Flora of North America)

Geography 
 
  Dry open coniferous or mixed forest alpine slopes, 0-2000 m; Greenland; St.Pierre and Miquelon; Alta., B.C., Man,. N.B., N.W.T, N.S., Ont., P.E.I., Que., Sask., Yukon; Alaska, Idaho, Maine, Mich., Mont., N.H., N.Y., Vt., Wash., Wiis., Wyo., circumboreal.".
(Flora of North America)