Arisaema tengtsungense H.Li

Plants dioecious. Tuber globose, 1–2cm in diam. Cataphylls 2, whitish pink, short, 2–4cm, membranous. Leaf solitary; petiole terete, 14–77cm, basal part forming pseudostem; leaf blade 3-foliolate or rarely quinate; leaflets sessile, pale green abaxially, green adaxially; central leaflet elliptic or ovate-elliptic, 5–14 × 3–7cm, base cuneate, apex acuminate; lateral leaflets obliquely ovate to ovate-lanceolate, 6–12 × 3–9cm, base cuneate at inner side, rounded at outer side. Peduncle shorter than petioles, 7–25cm, emerging from pseudostem. Spathe tube purple with white longitudinal lines, funnel-shaped, ca. 7 × 1.9cm, throat oblique, not auriculate, slightly recurved; limb dark purple with indistinct whitish lines, galeate, oblong in outline, 5–6.6 × 3–3.5cm, incurved, apex deeply 3-lobed; middle lobe smaller, lanceolate, ca. 5 × 2mm; lateral lobes oblong, ca. 1.5 × 1.3cm, apex rounded. Spadix unisexual; male zone cylindric, 1–1.5cm; synandria of 2 or 3 stamens; anthers sub-sessile, globose, dehiscing by horseshoe-shaped slit; appendix pendulous, flagelliform, 8–15cm, basal 2–3cm narrowly conic, 2–3.5mm in diam., base truncate and stipitate; stipe slender, 3–4mm. Female spadix unknown.