Slender to moderately robust, very variable as to vigour, root-climbing liane or hemiepiphyte. Shoot system well-differentiated into adherent, climbing shoots and free, lateral flowering branches; eocaul not observed; seedling with congested leaves similar in shape to adult, becoming progressively larger as shoot extends. LEAF rather glossy dark green above, paler to somewhat yellowish beneath; petiole 2–12 cm × 4–14 mm, usually exceeding the blade in length, oblanceolate, distally rounded to truncate to strongly auriculate; blade 1.5–15 cm × 3–15 mm, elliptic to narrowly lanceolate, somewhat acuminate-tipped, base rounded; primary lateral veins diverging at c. 30–40°, intramarginal veins 1 or 2 (or 3) on each side of the midrib. INFLORESCENCE solitary, less commonly paired, in the axils mostly of distal leaves of a flowering branch and subtended by cataphylls, rarely terminal on leafy branchlets; peduncle rather stout, c. 2–5 cm long. Spathe c. 1.5 –4 cm × 5–9 mm, ± lanceolate, wide opening to reflexed, purple-black to greenish. Spadix stipitate, more rarely sessile; stipe to c. 3 cm long and sometimes subequalling the spadix in length (particularly in individuals of very slender dimensions); fertile portion of spadix to c. 6 cm long, slender to rather stoutly cylindrical, yellow to purplish. Flowers c. 1.3 mm diam., with 6 free tepals and 6 stamens. INFRUCTESCENCE with many berries; fruit 8–13 mm long, ovoid, red when ripe; seeds not observed.