One to several pia leaves arise from the center of the plant on petioles (leaf stalks) 17 to 150 cm long.
Leaves are large and deeply divided, 30 to 70 cm long and up to 120 cm in width. The leaf upper surface has depressed veins, and the under surface is shiny with bold yellow veins. Flowers are borne on tall stalks in greenish-purple clusters, with long trailing bracts. The plant is usually dormant for part of the year and dies down to the ground. Later, new leaves will arise from the round underground tuber. The tubers are hard and potato-like, with a brown skin and white interior.
(Wagner,W. L., D. R. Herbst, and S. H. Sohmer. 1990. Manual of the Flowering Plants of Hawai`i)