Japan Flora: Leaves solitary, long-petioled, cordate-rounded, subacute, 7- to 9-nerved, 3.5-45 cm. wide; scapes about 10 cm. long, slender, pale purple, loosely sheathed, 1- flowered, the sheaths (reduced leaves) tubular, obliquely truncate; flowers solitary, terminal，at first ascending, nodding later, about 10 mm. long, purplish; bract thinly membranous, oblanceolate, about 5 mm. long; perianth-segments narrowly oblanceolate, subobtuse, thinly membranous, nearly erect; petals slightly shorter than the sepals; lip narrow, as long as the petals, 3-lobed, the lateral lobes elliptic, rugulose, white, purple-spotted inside, the median lobe very small, obtuse, white; ovary obovoid, prominently pedicelled. June.

Honshu (Izu Isis., Musashi and Izumi Prov.), Kyushu (Tanega- shima); very rare.