Xanthosoma appendiculatum Schott

Plant up to 1 m tall. Stems always hypogeous, rhizomatous, cylindrical, up to 4 cm in diameter, moderately covered by brown fibers, producing sparse cormels. Leaves 3-4 per plant; petioles 64-90 cm long, blackish-green, conspicuously waxy, sheathed up to 1/3 of its length, sheath revolute; leaf blade 14-33 x 25-30 cm, subcordate to sagittate in young plants, sagittate or occasionally hastate in mature plants, usually with the apical half turned upwards, glossy blackish green adaxially, medium glossy green abaxially, producing an extopic inverted leaflet-like appendage at some medial point of the midrib, appendage varying from hook-shaped or cup-shaped to broadly leafy and undulated or even duplicate, rarely lacking in young plants, primary lateral veins 6-7 per side, arising at an angle of 55-60°, slightly discolorous adaxially, concolorous abaxially, apex acuminate; basal ribs denuded for 0-1.5 cm, basal lobes turned backward or slightly extroses, round at apex. Inflorescences unknown.