Japan Flora: Tuber depressed-globose or hemispherical, some­times with 1-3 small tuberlets; basal scalelike leaves 3; normal leaves 2, palmate-pedate, the petiole terete, 3-10 cm. long; leaf­lets 8-14, sometimes the middle one short-petioluled, linear- lanceolate, 3-25 cm. long, 5-40 mm. wide, declined at apex in vigorous specimens, with a broad white line along the midrib, the margin prominently undulate, entire, or serrulate (forma serrulatum Nakai); peduncle longer than the leaves; spathe with the tube 3-4 cm. long, the blade ovate, bent down, recurved on the upper margins, reddish or brownish purple with longitudinal white stripes, auricles narrow, not promi­nent.  Apr.

Honshu (Idzu).