Arisaema souliei Buchet

Tuber subglobose, ca. 3cm in diam. Cataphylls obtuse at apex. Leaves 1 or 2; petiole 40–70cm, proximal half sheathing into pseudostem; leaf blade radiate to palmate; leaflets 6–9, usually 7, broadly oblong-lanceolate, base long cuneate, apex acuminate and caudate with filiform tail ca. 6cm; central leaflet 10–25 × ca. 5.8cm. Peduncle shorter than petioles, 20–40cm. Spathe green or distally dark brown with whitish stripes, 15–20 cm (including tail); tube cylindric, 5–10 × 1–2cm, throat obliquely truncate, slightly recurved or not; limb suberect, ovate to ovate-lanceolate, 4.5–5 × ca. 3.5cm, apex acuminate into filiform tail to 4–5cm. Spadix unisexual; female zone 2.5–3cm × 6–7mm; ovules 5–9, bottle-shaped; male zone ca. 2cm × 2.5mm; synandria sessile; anthers 2. Appendix stipitate, ca. 9cm in male spadix, 5–6cm in female, base whitish, swollen, ca. 3mm in diam. in male spadix, ca. 6mm in diam. in female, gradually narrowed distally, apex exserted from tube, erect or recurved, dark brown, 1–1.5mm in diam.