Stems densely scaly. Leaves pendent, linear. Veins anastamosing in single row of areolae on each side of midrib. Sori in single submarginal groove on each side of midrib. Gametophytes 0.5--2 × 0.5--1 cm; gemmae uniseriate, 2--5 mm, borne at apices of aerial branches; body cells 2--16; rhizoid primordia cells 0--4.