Perennial herb with woody rootstock producing long, subsucculent roots. Stems tufted, erect or somewhat twining, up to 0,6 m or more high, sparsely branched, with internodes 40-50 mm long, unifariously pubescent and with long hairs at nodes. Leaves: petioles 20-40 mm long, pilose on upper surface; blade cordate-ovate, up to 50 (-70) mm long and broad, acuminate, glabrescent, ciliate on margin. Flowers many, cymose in extra-axillary racemes; pedicels filiform, 15-30 mm long. Sepals linear-lanceolate, ±4 mm long, glabrous. Corolla 18-20 mm long, glabrous; tube campanulate, 5 mm long, about 6 mm diam.; lobes linear-lanceolate, 13-15 mm long, cohering at the delicate tips which readily become free on maturity. Corona appearing uniseriate, with 5 small pockets with outer margin deeply divided, confluent laterally with base of inner lobes; inner lobes linear-oblong, erect, obtuse or emarginate, ±2 mm long, greatly exceeÂding staminal column. Follicles slender, subcylindric, up to 100 mm long, slightly constricted at intervals of 6-7 mm.
