Pyrostegia C.Presl

Lianas; branchlets subangulate with 6-8 inconspicuous ribs, without inter-petiolar glandular fields, pseudostipules small and inconspicuous. Leaves 2-foliolate, often with a trifid tendril. Inflorescence a terminal or axillary panicle. Flowers with the calyx cupular, truncate, 5-denticulate, more or less glandular-lepidote; corolla orange-red, narrowly tubular-infundibuliform; stamens ex-serted, the anthers glabrous; pollen grains single, 4-colpate, the exine reticulate; ovary linear-tetragonal, lepidote; disc annular-pulvinate. Fruit compressed, linear, the valves parallel to the septum, smooth, the median nerve somewhat raised; seeds thin, bialate, the wings brown with hyaline margins.