Rather slender, heterophyllous(?), root-climbing liane. Shoot system architecture not fully known, but flowering shoots free and lateral; eocaul and seedling not observed. LEAVES chartaceous, drying yellowish green with the apical geniculum almost black; petiole 4–12 × 0.25–0.4 cm, stout, sheath prominent, extending to base of geniculum and overtopping it by two prominent ligules, clasping the shoot for almost its entire length; blade 12–28 × 3–9.5 cm, elliptic to oblong-elliptic or falcate-lanceolate, somewhat oblique, base subacute, apex acute to attenuate-mucronate, falcate, minutely apiculate; primary lateral veins arising 75–80°, intramarginal veins 2 per side, the outer intramarginal vein remaining close and parallel to margin. INFLORESCENCE solitary, terminal on leafy shoots, held arching from the tip of the shoot, very rarely produced from foliage-leafless shoots arising from otherwise leafy shoots; peduncle 6–17 × 0.05–0.15 cm, slender, very long and curving, dark purple-green. Spathe extremely elongate, 19–37 × 1–2 cm, very narrowly ovate, drooping and twisting into two or more graceful elongate spirals, base long-decurrent for up to 5 cm on peduncle, apex long acuminate, dark purple with paler longitudinal reticulations, drying very thin and somewhat shiny, degrading with fruiting and persisting as diaphanous netted tissue. Spadix stipitate; stipe 1–2.5 × c. 0.1 cm, very slender; fertile portion (6–)12–14 × c. 0.3 cm, very slender curving cylindrical, dark greyish purple. Flowers c. 1.6 mm diam., with 6 free tepals and 6 stamens. INFRUCTESCENCE with few berries; fruits 7–10 × 3.5–6 mm, oblong-ellipsoid; seeds not observed.