Stem twining, rather slender, pubescent with short curved retrorse hairs. Leaves herbaceous; petiole 1/2– 3/4 in. long; blade 1–1 3/4 in. long, 5/8–1 in. broad, cordate-ovate or cordate-oblong, acuminate, with an acute basal sinus 2–3 lin. deep, pubescent on both sides. Peduncles 4–7 lin. long, pubescent, umbellately many-flowered; bracts 1/2–1 lin. long, lanceolate, pubescent; pedicels 3 1/2–6 lin. long, glabrous or with here and there a hair. Sepals 2 1/2 lin. long, linear, acute, with recurving tips, hispidulous-pubescent. Corolla glabrous outside; tube 3/4 in. long, abruptly curved nearly at a right-angle just above the ovoid- or globose-inflated base, which is 2 1/2–3 lin. in diam., cylindric and 1 1/4 lin. in diam. above, broadly and shortly dilated into a funnel-shaped mouth about 4–5 lin. in diam.; mouth and upper part of the tube hairy within, glabrous in the lower part; lobes 1/4 in. long, narrowly linear from a broadly deltoid base, replicate, incurved and connate at their tips, hairy on their inner face. Outer corona 1 1/4 lin. long, deeply cup-shaped, 10-toothed to nearly half-way down; teeth linear, acute, erect, glabrous; inner coronal-lobes erect, 1 lin. long, spathulate-linear, obtuse, only slightly overtopping the outer corona, glabrous.
