Arisaema bannaense H.Li

Plants evergreen. Rhizome yellowish outside, purplish inside, robust, 8–9 × 3–4cm, rooting on whole surface and in different directions. Leaves 3–5 together, separately arranged on rhizome back, perhaps from different seasons; petiole pale green with dark green striae and whitish spots, or pinkish brown with black or dark brown short striae and sparse spots, cylindric, 28–60 × 0.4–2cm, encircled by cataphylls; leaf blade pale green abaxially, green adaxially, subpapery, 3-foliolate; leaflets entire, base obtuse, apex acuminate with acumen 1–2cm; central leaflet with petiolule 2.8–4.6cm, blade green with scattered pale brown and black spots, elliptic to oblong, 14–24× 6–10cm, base cuneate to rounded; lateral leaflets with petiolule 5–10mm, blade lanceolate, oblique, 12–24 × 4.5–10cm, base obliquely rounded; cataphylls 2 or 3, colored as petiole, 5–20cm. Peduncle encircled in cataphylls, colored as petiole, to 70cm. Spathe green; tube 6–8 × 1.5–2cm, throat margins spreading, auriculate; limb arching, obovate, ca. 5 × 3.5–4cm, apex acuminate or acute. Spadix bisexual and unisexual (male). Bisexual spadix: female zone ca. 2cm × 7mm; ovary pale green, ovoid; style short; stigma pale white, disciform; male zone ca. 1.5cm × 3mm, sparsely covered by male flowers; appendix erect, greenish white, cylindric, ca. 3 cm × 1.5–3mm, apex subclavate, verrucose to echinate. Male spadix: male zone ca. 6.7cm, base ca. 6mm in diam.; male flowers dense, of 2–4 stamens, subsessile; anthers violet to cream-yellow, ovoid or subglobose, dehiscing by an apical united slit; appendix cylindric, ca. 4.2cm × 3mm, base usually with some male flowers, apex subclavate, rugose, ca. 4mm in diam. Berry orange-red, obovoid, ca. 5 × 4mm.