herbs, usually tall and coarse, with tuberous rhizomes or with short, stout
caudex, flowering and leafing together. Leaves ovate-cordate, peltate, stoutly
petiolate. Spathe stoutly peduncled, tube persistent, mouth constricted, limb
erect, deciduous. Spadix shorter than spathe, male and female inflorescence
with usually interposed, flat neuters, appendage cylindric or subulate. Male
flowers : stamens 3-8, connate, anthers linear-oblong, dehiscence by apical
pore. Female flowers : ovary ovoid, 1-celled, ovules many, hemiorthotropous,
stigma sessile, discoid. Fruit obconic or oblong berries. Seeds oblong, sulcate.