Rootstock producing a cluster of cylindric or fusiform, succulent roots. Stem single, developed annually, somewhat fleshy, twining, sparsely branched, with long internodes, up to 1 m or sometimes much longer. Leaves fleshy, with petiole ±10 mm long, glabrous; blade broadly ovate to lanceolate, up to 80 x 60 mm; margin irregularly toothed. Peduncles lateral at nodes, single, 10-20(-70) mm long, spreading, 1-several-flowered. Flowers developing successively; pedicels rarely more than 10 mm long. Sepals mainly subulate to linear-lanceolate, 3-5 mm long, spreading. Corolla 35-50 mm long; tube 25-35 mm long, slightly curved, inflated at base with a slight constriction about middle of inflation and sometimes with a slight constriction at top of inflation, middle constriction coinciding with a thickening or collar-like outgrowth from inner wall, hairy in lower portion of inflation, glabrous and ribbed above, spreading at mouth and sinuses, mainly whitish with mauve marking; lobes united at tips, varying greatly in shape, forming a short to long pyramidal structure or apex rounded and cage-like, blackish purple and hairy within, marked with yellow spots near base. Corona with short basal tube 1 mm high forming 5 pockets with entire margins, confluent with backs of inner lobes; inner lobes linear, incumbent-erect, ± recurved.
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A succulent herb. It is a climber or scrambler. It has underground stems or rhizomes. It grows 1-5 m high. The leaves are 3-8 cm long by 2-6 cm wide. They are slightly fleshy and have teeth along the edge. The flowers are 4-5 cm long. The tube is joined at the tip. The roots are fleshy and in clusters.
Subsucculent twining perennial herb. Leaves broadly ovate to lanceolate, margin irregularly toothed. Corolla up to 50 mm long, lobes rarely longer than 15 mm, without long clavate hairs. Flowers whitish with mauve marking; lobes blackish purple and hairy within, marked with yellow spots near base.
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