Nyctocalos Teijsm. & Binn.

Lianas, without tendrils. Leaves pinnately 3-foliolate (in one extra-Mal. sp. 1-pinnate with 5 leaflets). Leaflets herbaceous to chartaceous, entire, ± elliptic, acuminate, with a few scattered crateriform glands along and spaced from the midrib underneath, above very fine punctate-pitted glandular. Inflorescence a short lateral or terminal 8-12-flowered raceme. Pedicels bracteolate. Flowers nocturnal, erect, fragrant; lobes widely imbricate. Calyx cup-shaped, truncate, with 5 hornlike teeth, the latter with glands on both sides. Corolla almost actinomorphic, salver-shaped, the long narrow basal tube dilated in the upper part, with 5 rounded unequal or subequal lobes. Stamens inserted in the throat 4 with or without a rudiment or 5, equal or 2 anterior ones sometimes longer, not exserted; anther-cells divergent, versatile; filaments glabrous and no hairs near their insertion. Disk annular, fleshy. Ovary with rows of ovules along the margins of the dissepiment; style long, filiform. Capsule large, flat, stalked and acuminate but with parallel edges, valves with a central prominent rib; dissepiment thinnish, flat. Seeds flimsy winged, roundish.

Rare rainforest lianas at low altitude.