Rhizome stout, branching, up to 15 dm. long. Aerial branches erect; up to 3 dm. long or more, occ. prostrate, occ. sublianoid, densely branched above, branches fastigiate. Lvs closely imbricate, incurved at tips, 3-5 mm. long, linear-lanceolate, acute to mucronate, midrib obscure. Strobili stalked, erect, solitary, paired, or several together, 2-5 cm. long. Sporophylls closely imbricate, broad-ovate, narrowed to long patent or recurved cusp; margins entire, scarious towards base.