Great Indian-plantain is an erect forb 1-3m tall, with a grooved stem with 6-8 angles and many short, broad, flat-topped flower heads, each with 5 narrowly cylindrical flowers. Fruits are dark brown to purple cypselae (achene surrounded by calyx sheath), 4-5mm, that taper toward one or both ends. Leaves are irregularly toothed, green on both sides, and palmately veined. The lower leaves are very large, up to 80cm wide, kidney-shaped, with long petioles. The upper leaves are smaller and fan-shaped or oval.