Herb up to 100 cm. tall, rhizomatous; stems ascending to erect, unbranched or branched, up to 7(–10) mm. thick, puberulous.. Leaves in spirals; lamina chartaceous to papyraceous when dry, elliptic to subovate, (1–)3–13(–20) × (1–)2–5(–7) cm., apex acute to faintly acuminate, base cuneate to attenuate, margin irregularly, coarsely to faintly dentate; upper surface glabrous or sparsely puberulous on the midrib, lower surface glabrous or sparsely puberulous on the main veins; lateral veins 4–9 pairs; petiole 0.5–3(–4) cm. long, 0.5–1 mm. thick, mainly adaxially puberulous; stipules subulate, ± 1 mm. long, caducous.. Inflorescences solitary; peduncle 1–2.5(–3) cm. long, ± 0.5 mm. thick.. Receptacle discoid to slightly funnel-shaped, flowering face subcircular, 0.5–1.1 cm. in diameter, margin up to 0.5 mm. wide; appendages in 2 ± distinct rows, the inner (marginal) row triangular to linear, up to 8 mm. long, the outer (submarginal) row 8–12, filiform, up to 55(–70) mm. long.. Staminate flowers ± spaced; perianth-lobes 3; stamens 3.. Pistillate flowers numerous, spaced; perianth tubular; stigmas 2.. Endocarp-body tetrahedral, ± 1 mm. in diameter, tuberculate.
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