Japan Flora: 20.    Tuber depressed-globose; pseudostem 15- 20 cm. long, to 1 cm. thick; leaves 2, the petioles 5-10 cm. long; leaflets 5, nearly palmate, oblong to narrowly so, usually dentate, acuminate, the terminal one 8-12 cm. long, 2-4 cm. wide; peduncle 10-20 cm. Jong, longer than the leaves; spathe­tube ampliate above, upper margins slightly recurved, the spathe-blade ovate to narrowly so, 6-8 cm. long, declined over the spadix, greenish or partly purplish; spadix-appendage thick-cylindric or clavate, slightly thickened at tip, truncate at base.  May-July. Woods.

Honshu (Kanto Distr.)