Arisaema brucei H.Li, R.Li & J.Murata

Plants dioecious. Tuber subglobose, 1.8–2cm in diam. Cataphylls not seen. Leaf solitary; petiole 24–30cm, glabrous, proximal 5–7cm sheathing into pseudostem; leaf blade 3-foliolate; leaflets subsessile, green with purple margins, glabrous, margins subcrenulate or crenate; terminal leaflet elliptic, ca. 11 × 4–6cm, base cuneate, apex acuminate; lateral veins 12–15 per side, collective vein 0.5–1.5mm from margin; lateral leaflets lanceolate, oblique, ca. 11 × 3.3–3.5 cm, base cuneate, apex long acuminate. Peduncle shorter than petioles, 12.5–16cm. Spathe suberect, 12–13cm; tube brown with whitish stripes, obconic, 4.5–5 × 1.7–2cm, throat margins obliquely truncate, slightly recurved, not auriculate; limb slightly incurved, dark brown with whitish stripes, oblong, 7.5–8 × 2.4–3cm, base not constricted, apex acuminate with white reticulate stripes. Spadix unisexual; male zone cylindric, 1.3–1.7cm; synandria lax, stipitate; filaments 1.5–2mm; anthers 2–4, dehiscing by horseshoe-shaped slits; appendix distally curved, cylindric, ca. 6cm in total, proximal 2.5–3cm suberect, ca. 3mm in diam., abruptly swollen toward base, base conic, 4–5mm in diam., truncate, with stipe ca. 4.5 × 1.3mm, apex attenuate, obtuse. Female spadix unknown.