Leaves petiolate, hastate to sagittate.
Spathe withering befor fruit is ripe, the lower part with overlapping margines. Sapdix with long appendix. Flowers unisexual, withuot perianth, the male separated from the female, but not widely. A verticulate tuber is discoid or depressed-globose, with the shoot apearing from nera the centre of the upper surface. A horizontal tuber is irregularly cylindrical, with the axis of the cylinder horizontal and the shoot appearing at one end of the axis.