Japan Flora: Tuber depressed-globose, without lateral tubers; leaf soli- tary, the petiole terete, about 10 cm. long, leaflets 7-13, lanceo­late to broadly so, acuminate, the terminal one 6-20 cm. long, about 3 cm. wide; spathe pale green, the upper margins of the tube slightly recurved, the blade abruptly narrowed from a deltoid base to a long linear tip, erect, 6-8 cm. long; spadix­appendage narrowly cylindric, terete, not thickened at apex.   

Pseudostem about 50 cm. long; leaf solitary, the petiole terete, about 10 cm. long; leaflets 15-19, oblong to lanceolate, the terminal one 12-16 cm. long, 2-5 cm. wide; peduncle 2-5 cm. long; spathe greenish, the margin of the tube scarcely recurved, the blade bent forward, ovate- lanceolate, gradually long taillike at apex, papillose on the margin; spadix-appendage slender, about 2 mm. in diameter, the base thickened to about 5 mm., truncate. May.

Tuber depressed-globose; pseu­dostem 12-37 cm. long; leaf single, on a petiole about 6.5 cm. long; leaflets 7-11, oblong-lanceolate, acuminate, the terminal one larger, 9-10 cm. long, 17-35 mm. wide; peduncle 5-6 cm. long; spathe greenish, the upper margins of the tube strongly recurved, the blade ovate, 3-4 cm. long, about 2 cm. wide, acuminate, greenish; spadix-appendage narrowly cylindric, rounded and about 1 mm. across at apex, gradually thickened to 5 mm. in diameter at base.  Apr.-June. 

Honshu (Kinki Distr.), Kyushu (Inugatake in Buzen Prov.)