Arisaema cordatum N.E.Br.

Plants dioecious. Tuber globose, 1–1.5cm in diam. Cataphylls 2 or 3, ca. 5cm, membranous. Leaf solitary; petiole 10–30cm, slender, base forming short pseudostem; leaf blade pedate; leaflets (5–)7, sessile, light greenish, oblong, 7–10 × 1.5–3cm, membranous, base broadly cuneate, apex acute to abruptly acuminate. Inflorescence emerging before leaf unfolds; peduncle 3–10cm, slender. Spathe basically purplish; tube cream-colored, outside stained with purplish, inside dark purple, funnelform, 3–3.5 × 1–1.4cm, throat margins broadly expanded to limb; limb broadly cordate, ca. 6 × 4cm, apex acuminate and involute, surrounding spadix appendix. Spadix unisexual; female zone ca. 1cm; ovary fusiform; male zone ca. 1cm × 3mm, shortly stipitate; synandria consisting of 2 anthers, thecae globose, dehiscing by apical pores. Appendix sessile, 15–27cm, proximally fusiform, to 4mm in diam., distally upright, exserted through involute apex of spathe limb, filiform.