Japan Flora: Delicate herb; stems weak, appressed-creeping, densely leafy, 4-6 mm. wide; leaves of lower plane broadly ovate, 2-2.5 mm. long, spreading or slightly recurved, acute, slightly unequal, obsoletely ciliate, rounded on upper margin near base, those of the upper plane narrowly ovate, about 1 mm. long, cuspidate, denticulate; fertile branches 5-10 cm. long, erect, scapiform, simple to sparsely branched, the bracts abruptly acuminate; leaves on fertile branches all alike or slightly dimorphic, more densely disposed than on sterile branches, ovate; sporangia in axils. May-July. Damp shaded places in lowlands and hills;

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu; common. Korea and China.