Symplocarpus renifolius Schott ex Tzvelev

Rhizome hypogeous, to 7cm in diam. Leaves in a rosette; petiole to 40 × ca. 1cm; leaf blade orbicular-cordate, 30–40cm long and wide or nearly so (to 33cm wide), mid-green, base cordate, apex acute; venation reticulate, midvein very strong, primary veins 5 on each side, ascending toward apex, lower-most ones running into basal lobes. Flowering before leaves appear; inflorescence usually solitary; peduncle green and purplish tinged, 7–13(–20) × ca. 1cm. Spathe plain purple to blackish purple, rarely green without any markings or with dark purple spots, boat-shaped, 8–20 × 5–12cm, strongly leathery, apex acuminate. Spadix ellipsoid, 2–2.5 × ca. 1.2cm. Flowers densely arranged. Flower 3–3.5mm in diam., tepals pinkish, thecae yellow.