Japan Flora: Terrestrial, erect perennial with broadly ovoid, tuberous roots; stems 30-60 cm. long; leaves 4-5, broadly lanceolate to narrowly ovate-oblong, 8-15 cm. long, 2-4 cm. wide, acute, shortsheathing at base, with narrow translucent margins, the upper leaves scalelike, appressed to the stem, narrowly lanceolate, 3-5 cm. long, with a filiform point; inflorescence rather densely flowered; bracts broadly linear; flowers white, 2-25 cm. across; sepals narrowly ovate, 10-13 mm. long, acute, the lateral sepals oblique and slightly deflexed; petals lanceolate, 8-10 mm. long, acuminate, entire, 1- to 2-nerved, forming a hood with the dorsal sepal; lip 15-18 mm. long, 3-lobed, the lateral lobes spreading, broadly cuneate, shallowly laciniate, the terminal lobe linear, 1-nerved, 5-8 mm. long; spur about 3 cm. long, gradually thickened toward the obtuse apex; ovary about 2 cm. long. Aug.-Oct. Thickets;

Honshu (Awa Prov.), Shikoku, Kyushu; rare. Ryukyus, Formosa, and s.China.