Arisaema auriculatum Buchet

Plants dioecious. Tuber globose, small, 1–2cm in diam., shortly stoloniferous. Cataphylls 3, brownish purple with tiny black striae, to 18cm, apex obtuse. Leaf solitary; petiole greenish with some grayish spots, 20–30cm, proximal 1/3 sheathing into pseudostem; leaf blade pedate; leaflets (7–)9–15, sessile, oblanceolate or oblong, base attenuate, margin entire or erose, apex acuminate; central leaflet usually larger than or equaling lateral ones; lateral leaflets 10–12 × 2.5–3.5cm, outermost ones 1.5–4 × 0.3–1.5cm. Inflorescence emerging before leaf; peduncle grayish green with whitish spots, shorter than petioles, 12–25cm. Spathe 7–12cm in total; tube green or pale brown, densely flushed with dark purple or dark brown spots, narrowly cylindric, 4–6cm × 7–15mm; limb deeply 3-lobed; lobes green or purple, often flushed with dark purple or black spots on back; lateral lobes oblong or oblanceolate, 20–25 × ca. 7mm, spreading into auricles at tube throat; central lobe ovate to elliptic, 2–3 × 1.4–1.8cm, base constricted, apex acuminate, incurved. Spadix unisexual; female zone conic, 12–15 × 6–7mm; ovaries dense, green, ovoid; stigma subsessile; male zone 1.5–2cm, slender; synandria lax; anthers sessile, violet, globose; thecae dehiscing from apical pore. Appendix sessile, ascending, sigmoid, dark violet, flagelliform to filiform, 7–12cm, 1–2mm in diam. in basal part. Infructescense subglobose. Berries red.