Paradioecious, 16.5-33 cm tall. Bulb subglobose, depressed, 2.5x 4 cm broad; roots fibrous. Leaf solitary, conspicuous; leaflets 3, subsessile, each 8.5-20 x 4-18 cm, median one rhombic-orbicular to rhomic-ovate, sub-acuminate; petiole 20-35 cm long, petiolule 2-3 mm long. Spathe tube 5-8.5 cm long, brown-purple, white ribbed; limb strongly curved, obovate, 4-8.5 cm broad, abruptly terminating in a point 1-2.5 cm long. Spadix appendage whip-like, 15-22 cm long, prolonged beyond the spathe. Male zone c. 2.2-2.3 cm broad. Style purplish; stigma subcapitate. Berry c. 5 mm broad; ovoid to subglobose; young berries white striped; seeds 1-3, subglobose, 2.5-3 mm broad, acutish at one end.

Fl.Per.: June July.

Type: Sikkim, 10-12000’, J.D Hooker (K; isotype GH).

Distribution: Temperate Himalayas: Hazara and eastward to Sikkim and Bhutan.

Fairly common in shade in rich forest from 2300-3300 m. Variable in the size of its parts. Can be easily recognised by its large conspicuous foliage. The male plants are not so common in occurrence as the female. The occurrence of 2 leaves is not common. The peduncle may be equal to the petiole. I have not observed plants with leaves having a golden margin as noted by Hook. f., l.c. Related to Arisaema griffithii Schott from E. Hima¬layas, which differs in the larger and involuted spathe limb.