Stem twining, branched, glabrous; leaves spreading; petiole 1/2-1 lin. long; blade 6-10 lin. long, 2-3 1/2 lin. broad, elliptic or lanceolate-elliptic, acute or mucronulate, glabrous on both sides, pallid beneath, papery in texture; cymes many times shorter than the leaves, 2-4-flowered, glabrous; pedicels 1/2-3/4 lin. long, glabrous; sepals scarcely 1 lin. long, ovate, subobtuse, glabrous; corolla 1 1/2 lin. long, lobed to below the middle, campanulate, glabrous; lobes oblong, obtuse; corona-lobes inserted below the corolla-throat, oblong, obtuse, glabrous; filaments of the stamens very short; anthers hastate-lanceolate, subacute, glabrous, without an appendage; style-apex shortly conical.
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