Lianas, the branchlets terete, usually with interpetiolar glandular fields; pseudostipules absent. Leaves 2-foliolate, often with an uncinate-trifid tendril. Inflorescence a corymbose, axillary raceme or reduced to 1 or 2 flowers. Calyx campanulate, 5-lobed, glandular; corolla magenta, tubular-campanulate, glabrous or puberulous outside. Anthers glabrous, divaricate, the connective slightly extended. Ovary linear-oblong, lepidote; ovules irregularly 3- or 4-seriate in each locule; disk cupular. Fruit a linear capsule, glabrous, the valves split in middle, the dehiscence thus both perpendicular and parallel to the septum. Seeds thin, 2-winged.
Venezuela, Guyana, Suriname, French Guiana, Amazonian Ecuador, coastal Brazil; 2 species, 1 in Venezuela.
Parabignonia steyermarkii Sandwith, Bol. Soc. Venez. Ci. Nat. 26: 446. 1966.
Canopy liana. Wet cloud forests, 400-1200 m; Delta Amacuro (Serranía de Imataca), Bolívar (Perai-tepui, Serranía de Imataca, Sierra de Lema). Sucre; Guyana, Suriname, French Guiana, disjunct in Amazonian Ecuador. Fig. 398.
Parabignonia steyermarkii is related to Macfadyena by the trifid tendrils with uncinate cat's claw hooks but differs in the magenta corolla and split capsule valves.