Lianas. Inflorescences thyrses, axillary or extra-axillary, longer than leaves, many flowered. Calyx glands 5, 2-toothed. Corolla rotate; tube short, sometimes with 5 scales alternate with corolla lobes; lobes overlapping to left. Corona campanulate, inserted on back of gynostegium, apex 5-cleft; lobes revolute, as long as stamens. Filaments connate into a short tube; anthers without apical appendages; pollinia 4 per pollinarium, oblong, erect, retinaculum minute, translator very short or absent. Stigma head fusiform.
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