Root : Adventitious but some may arise at the nodes.
Stem : Mostly rhizome but sometimes rises a considerable distance above the ground and a part may become aerial.
Leaves : Mostly large, entire, petiolate, more of less ovate and cordate or sagittate, parallel venation, petioles are well developed and swollen at the base, raphides are present in the cells of a leaf.
Inflorescence : Spadix. It is covered by a leafy bract which is called spathe. The spathe is tubular at the base and spread above. Spadix is free and shorter than spathe.
Sessile, bracteates, ebracteolate, incomplete, actinomorphic, hypogynous, unisexual but both male and female flowers found on the same spadix; female flowers above and male below with neutral flowers in between male and female flowers.
Perianth is absent.
Androecium : Stamens 3-5 arranged in a single whorl; the filaments are united throughout their length forming a synandrium, anthers dithecous, dehiscing by pores.
Gynoecium : Ovary superior, ovoid, 2-4 carpels, syncarpous, unilocular with few basal orthotropous ovules. Style short, Stigma 2-4 lobed.
Fruits : A red colouredberry, almost spherical, few seeded, enclosed by the accrescent tube of spathe.
Seeds : Black coloured, albuminous, rounded, thick smooth testa and axile embryo.
Significance : It is either grown for its beautiful foliage in the gardens or it is cultivated for its edible rhizomes.