Japan Flora: Delicate glabrous low saprophytic perennial herb; rhizomes filiform, elongate, sparingly branched; scapes solitary, about 1 cm. long, few-scaled; flowers solitary, about 15 mm. long, 6-7 mm. across, the perianth-tube ovoid-campanulate, about 10 mm. long, the upper portion deciduous after anthesis on the transverse split above the base, the outer perianth-lobes about 3 mm. long, broadened at base, linear and spreading above, the inner lobes obovate-cuneate, erect, incurved above, 5-6 mm. long, each bearing an erect linear rather short ap­pendage on back, the upper portion overlapping but free from each other; stigma glabrous July-Aug.

Shikoku (Awa Prov.), very rare.