Arisaema xuanweiense H.Li

Plants dioecious. Rhizome vertical, 3–5 cm × 7–10mm, producing stolons. Cataphylls 2 or 3, whitish green, 3–8cm, membranous, acuminate at apex. Leaves 1 or 2; petiole greenish, 15–18cm, proximally forming pseudostem; leaf blade 3-foliolate, pale green abaxially, green adaxially; leaflets sessile, serrate; central leaflet suborbicular, 8.8–11 × 6–8.5cm, base obtuse, apex acute; lateral veins 5 per side, parallel, collective vein 2–3mm from margin; lateral leaflets obliquely ovate, 8.5–10.8 × 5.8–8.2cm, base rounded, apex acuminate. Peduncle greenish, terete, to 18 cm. Spathe nearly erect, ca. 9.5cm; tube green, cylindric, ca. 4 × 1.5cm, basal ca. 1cm white, throat obliquely truncate, straight or slightly recurved; limb green with whitish stripes, abaxially with a large (ca. 1cm) oblong white area, incurved, ovate, ca. 5.5 × 4cm, apex acuminate with a tail ca. 8cm. Spadix unisexual; female zone subconic, ca. 15mm; flowers dense; ovary green; stigma sessile; appendix erect, whitish green, cylindric, ca. 35 × 3.5mm in total, base subtruncate, ca. 5mm in diam., stipitate; stipe ca. 3 × 2 mm. Male spadix unknown.