Arisaema franchetianum Engl.

Plants dioecious. Tuber renewed seasonally, creamy red outside, depressed globose, 1–6cm in diam., bearing many tubercles around. Cataphylls 2 or 3, pale brown with purplish spots, membranous. Leaf solitary; petiole creamy red or pale green, without spots, 20–50cm, base forming pseudostem, 1–2cm in diam.; leaf blade 3-foliolate; leaflets sessile or subsessile, subleathery; central leaflet ovate, broadly elliptic, or subovate, 7–23 × 6–22cm, base shortly cuneate to rounded, apex abruptly attenuate; lateral leaflets obliquely elliptic, 6–20 × 5–19cm, base cuneate. Peduncle erect in flowering, recurved at fruiting, brown with white dots, shorter than petioles, 10–30cm. Spathe dirty purple or dark purple with white or greenish white longitudinal lines; tube cylindric, 4–6 × 1.2–2cm, throat margins slightly recurved; limb galeate-recurved, 4.5–11 × 3–5cm, apex long acuminate with a tubular tail 5–6cm, whiplike, pendulous. Spadix unisexual; female zone cylindric, 1.2–3.8 cm × 8–20mm; ovaries dense, greenish purple, ca. 5 mm; ovules 2, basal, erect; stigma convex; male zone narrowly conic. Appendix recurved from middle, sometimes suberect, 1.5–4 cm × 2.5–6mm, base attenuate into short stipe, 4–8 mm in diam., apex 1–2mm in diam.