Japan Flora: Tuber depressed-globose, 15-30 mm. in diameter; basal scalelike leaves 4 or 5, crimson or light purplish; normal leaves 2, palmate-pedate, 7- 11 cm. long; leaf­lets 5-7, narrowly oblong, entire or serrate, long-acuminate; peduncles longer than the leaves; spathe with a cylindric tube 3.8-4 cm. long, with large auricles on die recurved upper mar­gins of the tube, the blade bent forward and arching over the spadix, elongate- to broadly ovate, acuminate, dark purple with longitudinal white stripes; spadix-appendage thick, clavate, whitish, or with purplish spots.    May-June.

Hon­shu (Mount Hakone).  Allied to A. limbatum.