Perennial herb with rootstock producing a tuft of fusiform roots. Stems slender, glabrous, sparingly branched, climbing. Leaves rudimentary, ± lanceolate. Flowers solitary, extra-axillary at nodes. Sepals lanceolate, ±3 mm long. Corolla 30-40 mm long, glabrous; tube with basal inflation more or less spherical, ±7 mm diam., expanding gradually to mouth and conspicuously veined; lobes united into an incised canopy expanding to 10-12 mm diam., more or less flat-topped, broader than mouth of tube. Corona shortly campanulate at base, with 5 outer lobes suberect and usually deeply bilobuled; inner lobes linear, incumbent-erect.
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