Diplophyllum verrucosum

Terrestrial or lithophytic, green, becoming orange-red when well-illuminated. Gemmae infrequently produced, 1-celled, angular-stellate, brownish. Stem ascending to erect. Leaves falcate, 1.23–1.65 mm long, 0.58–0.85 mm wide, slightly separated to slightly imbricate, folded forming rounded and prominently arched keel 0.4–0.6 of ventral lobe length, with lobes widely divergent, giving shoot 4-ranked appearance, basally canaliculate and loosely sheathing stem, rigid, brittle, base extending to beyond stem midline and imbricate with opposing ventral leaf lobe base. Ventral lobe narrowly ovate, 0.58–0.7 mm long, reflexed to inflexed, denticulate or rarely entire, acute or apiculate at apex. Dorsal lobe falcate, 0.38–0.53 mm long, 0.43–0.65 mm wide, ovate, 8–0.9 length of ventral lobe, 0.7–0.8 area of ventral lobe, squarrose, denticulate, broadly acute to rounded at apex. Leaf cells near keel rectangular, 20–75 µm long, 7–18 µm wide, elsewhere mostly quadrate, 7–23 µm long, 5–15 µm wide, evenly thick-walled without trigones, pluripapillose, with 2–4 oil bodies in cells of apical half; oil bodies spherical to ellipsoid, botryoidal. Rhizoids scattered. Perianth ellipsoid to obolid, pluriplicate in apical half, white, lobulate and ciliate at mouth.