Stem twining, 3/4–1 1/2 lin. thick, pubescent along one line alternating at the nodes, otherwise glabrous. Leaves spreading; petiole 1–2 1/2 in. long, pubescent; blade 2 1/2–5 1/2 in. long, 1 1/2–4 in. broad, cordate-ovate or elliptic-ovate, shortly cuspidate, acute or acuminate, deeply cordate at the base, with a broad subtruncate sinus between the semiorbicular incurved or overlapping basal-lobes, palmately 7-nerved, denuded along the basal nerves at the sinus, thinly and rather minutely pubescent on both sides or nearly glabrous above. Cymes large, glabrous, divided at their origin into 2–3 branches from 1/2–7 in. long, which are dichotomously or trichotomously branched and bear several umbel-like cymules of 3–4 flowers; bracts subulate 1/2–1 lin. long,; pedicels 2/3–1 1/2 in. long, slender, glabrous. Sepals 1 1/2 lin. long, lanceolate, acuminate, glabrous. Corolla 7–8 1/2 lin. long, glabrous outside and within; tube 4–5 1/2 lin. long, subcylindric or slightly inflated at the base; lobes 3–3 1/2 lin. long, linear-lanceolate, attenuate-acute, erect, connate at the tips, apparently orange-red. Outer coronal-lobes 1/6 lin. long, arising 1/2 lin. above the base of the 1 lin. long staminal-column, spreading, subrectangular, bifid, concave; inner coronal-lobes 1/2 lin. long, linear, acute, truncate or slightly broadened and bifid at the apex, longer than the anthers, closely applied to their backs and connivent over them. Follicles 6–6 1/2 in. long, 2–2 1/2 lin. thick, linear, tapering into a slender beak at the apex and into a stipe at the base, very slightly torulose. Seeds 1/3 in. long, 1 lin. broad, much rounded on one face, deeply concave on the other, glabrous, crowned with a tuft of hairs.
