Ohwi 1985 Flora of Japan

Japan Flora: Rhizomes short, sparsely scaly, few leaved, the roots elongate, rather thick, puberulent; leaves jointed at the sheathing base, the blade narrowly oblong to broadly oblanceolate, 4-15 cm. long, 1.5-3 cm. wide, short- acuminate, narrowed at base, scabridulous on the upper margins; scapes lateral, 10-15 cm. long, few-sheathed; racemes loosely 2- to 4-flowered, pendulous, glabrous, with a slightly flexuous axis, the bracts membranous, linear-lanceolate, 8-15 mm. long, acuminate; sepals linear-lanceolate, 22-25 mm. long, 2.5-3 mm. wide, acuminate, white with a greenish flush, the lateral sepals slighdy reflexed; petals narrowly oblong, about 2 cm. long, 5-6 mm. wide, subacute, white with a brown-purple band; lip white, brown-purple spotted within, obovate- oblong, 13 mm. long, about 10 mm. wide, subobtuse, fleshy; column about 13 mm. long; anther yellow, minutely mamilate; capsules erect, about 5 cm. long inclusive of the short pedicel. July-Aug.

Honshu (s. Kanto, Tokaido, Izu- Shichito Isis, and westw.), Shikoku, Kyushu; rare. Ryukyus and Formosa.