Japan Flora: Tuber depressed-globose, usually bearing a few small lateral tubers; leaf soli­tary, the petiole nearly erect, terete, 30-60 cm. long; leaflets 9-17, linear- to broad-lanceolate, acuminate, 10-25 cm. long and 1-4 cm. broad in the terminal one; peduncle arising from the lower part of the petiole, 10-20 cm. tall; spathe uniformly dark purple or reddish purple, sometimes purplish bronze, the blade ovate, strongly arching over the spadix, the upper part semipendulous and long-filiform tapering, 8-10 cm. long; spadix-appendage filiform, 30-50 cm. long, erect, pendulous at tip, gradually thickened below forming a densely wrinkled, fusiform enlargement and further narrowed toward the flo­riferous part.  Apr.-May.  

Tuber depressed-globose; leaves 2, petioled; leaflets 7-15, lanceolate, the terminal one 5-25 cm. long; peduncle 10-25 cm. long; spathe dark purple, the blade deltoid-lanceolate, 7-15 cm. long, 2-4 cm. wide, gradually tapering at tip, erect and bending forward horizontally; spadix-appendage narrowly cy­lin dric, the upper part bent slightly forward and rather thick, thickened and truncate at base.

Tuber depressed-globose, usually bearing a few small lateral tubers; leaf soli­tary, the petiole nearly erect, terete, 30-60 cm. long; leaflets 9-17, linear- to broad-lanceolate, acuminate, 10-25 cm. long and 1-4 cm. broad in the terminal one; peduncle arising from the lower part of the petiole, 10-20 cm. tall; spathe uniformly dark purple or reddish purple, sometimes purplish bronze, the blade ovate, strongly arching over the spadix, the upper part semipendulous and long-filiform tapering, 8-10 cm. long; spadix-appendage filiform, 30-50 cm. long, erect, pendulous at tip, gradually thickened below forming a densely wrinkled, fusiform enlargement and further narrowed toward the flo­riferous part.  Apr.-May.  

Tuber hemispherical, 3-7 cm. across, with rather many supernumerary young tubers and young shoots; pseu­dostem 30-70 cm. long, 2-3 cm. in diameter at base, 7-15 mm. above; scalelike leaves 4; normal leaves 2; leaflets 5-13, the terminal leaflet oblong or narrowly elliptic, petiolulate or nearly sessile, the lateral leaflets oblanceolate or oblanceolate- oblong; scape equaling or shorter than the leaves; spathe greenish, the tube 4.5-85 cm. long, whitish at base, 1.5-2 cm. in diameter, slightly recurved on upper margins, the blade dark green with white longitudinal stripes, orbicular-ovate or oval, 5-6 cm. long, 4-4.5 cm. wide, acuminate; spadix-ap- pendage 4-6.5 cm. long including the short stipe 3-10 mm. long, clavate, green, thickened at apex, about 5 mm. in diameter.                      

Hokkaido, Honshu (centr. and n., s. Kinki, Chugoku), Shi­koku, Kyushu