Stems twining, robust, terete, greyish-strigillose. Leaves broadly ovate to orbicular, 8-18 by 8-18 cm, shallowly cordate to truncate at the base, shortly acuminate, mucronulate at the apex, glabrous or nearly so above, sparsely hairy beneath, more densely so on the nerves; midrib and 9-11 nerves on either side prominent beneath; minor nerves many, subparallel; petiole shorter than the blade, 4-7 cm, hairy like the stem. Peduncles 8-28 cm, hairy like the stem, cymosely branched at the apex with several to many flowers, the larger ones bearing below the terminal cyme 1 or 2 lateral ones in the axils of small, ovate to broadly ovate leaves. Pedicels shorter than sepals, 5-8 mm, terete, greyish appressedly hairy. Bracts lanceolate or oblong-lanceolate, attenuate towards the base, acute at the apex, lower ones 10-18 mm long. Sepals lanceolate, acute, with recurved top; three outer ones 10-12 mm long, inner ones ca 9 mm, thinly white sericeous outside and inside near the apex. Corolla tubular to funnel-shaped, ca 1 cm long, pink purple, dark purple inside; midpetaline bands hairy outside, rest of corolla glabrous. Filaments pilose at the base. Ovary glabrous, 4-celled.
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