Japan Flora: Mon­oecious; tuber hemispherical, 2-4 cm. across; scalelike leaves 4 or 5, tunicate; normal leaf solitary, on a long erect stemlike sheath to 1 m. tall and 1-2 cm. thick, the petiole erect-spread­ing, 6-14 cm. long; leaflets 13-19, oblanceolate or oblong, sub- abruptly contracted at apex, undulate on margin, the terminal leaflet much shorter than the others, the first lateral ones 10-25 cm. long, 2-6.5 cm. wide; spathe on a long erect scape, green, the tube 3.5-8 cm. long, dark purplish on margin, the blade ovate, 7-12 cm. long, 3-7 cm. wide, usually green, bent for­ward and arching over the spadix, abruptly short-acuminate; appendage of spadix filiform, erect, 15-30 cm. long, slighdy thickened at base and passing into the floriferous part. May-July. Wet places in lowlands.

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu; rather rare. s. Korea, For­mosa, and China.

Japan Flora: tuber depressed-glo­bose, bearing several to rather many small lateral tubers; leaf solitary (very rarely 2), the petiole terete, nearly erect, 30-50 cm. long, the leaflets 11-15, oblanceolate to broadly lanceolate, acuminate, the terminal one 10-18 cm. long, 2-3.5 cm. wide; peduncle 10-20 cm. long, arising 7-15 cm. above base of petiole; spathe dark to bronze-purple, sometimes reddish purple, the blade ovate to broadly so, abruptly long taillike at tip, strongly arching over the spadix; spadix-appendage filiform, 40-60 cm. long, long-exserted, the upper half bent abruptly downward and pendulous, gradually thickened below forming a smooth oblong enlargement then gradually passing into the floriferous part. Apr.-May.

Hokkaido (Oshima and Hidaka Prov.), Honshu, Shikoku.