Herb to 1.2 m. tall.. Tuber subglobose, ± 5 cm. in diameter.. Leaves 1–2; petioles with basal sheaths imbricate, forming green crimson-speckled pseudstem to ± 45 cm. tall; free apical part (5–) 17–40 cm. long; blade usually laxly pedate, rarely compactly pedate, reniform in outline, leaflet bases (0.3–)0.7–2.2 cm. apart; leaflets (4–)6–8, elliptic-oblanceolate, long-acuminate with filiform tips up to 8 cm. long, (5–)8.5–32 cm. long, (1.2–)3–11 cm. broad, outermost smaller than the rest, margins entire or obscurely crisped.. Inflorescence ± equalling or overtopping leaves; free part of peduncle 6–30 cm. long, green.. Spathe 7–23 cm. long; tube cylindric to obconic, not constricted apically, 4–9.5 cm. long, 1.3–3 cm. in diameter, outer surface green with cream-yellow to white stripes; limb ovate, long-acuminate, arching forward and downward over tube-mouth, 7–16.5 cm. long, 2–4.7(–6) cm. broad, much longer than tube, with filamentous tip 2–7 cm. long, similar in colour to tube but with broader stripes basally.. Spadix normally unisexual, 5–10(–11) cm. long, overtopping spathe-tube; sterile appendix cylindric to clavate, subtruncate basally, usually ± stipitate, 3–6 cm. long, 0.2–0.9(–1.2) cm. in diameter, apex rounded, green; staminate spadix with fertile part 3.5–4.5 cm. long, 0.3–0.5 cm. in diameter, rarely with sterile projections at appendix base; pistillate spadix with fertile part 2–2.5(–5.5) cm. long, 0.9–1.3 cm. in diameter, usually with sterile projections at appendix base.. Staminate flower composed of 2–3 stamens.. Pistil ovoid, 3–4 mm. long; ovary 2–3 mm. in diameter, narrowing upwards into a short style; stigma capitate.. Berries subglobose, up to 1 cm. in diameter, 1–3-seeded, borne in subcylindric spike up to 9.5 cm. long, 4 cm. in diameter.. Seeds subglobose, 0.6 cm. in diameter.. Fig. 16/9–13, p. 62.
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