Leaves are and . The lamina or leaf blade is oblong in shape and reaches exceptionally large dimensions of up to 60 cm by 20 cm. The apex of the lamina is -obtuse, while the base is abruptly contracted where the petiole begins. The petiole itself is up to 15 cm long. It is (grooved lengthwise) and typically bears wings that form a partially sheath around the stem. One to three longitudinal veins are present on either side of the midrib, but veins are indistinct. Tendrils measure up to 35 cm in length.