Stem twining, pale greyish-brown, glabrous. Leaves distant, spreading, 1 1/4–4 in. long, 1/3– 1/2 lin. broad, subsessile, linear, acute, margins strongly involute, glabrous on both sides. Cymes axillary, or terminating short axillary shoots that bear 2–4 leaves, arising from both axils, loosely trichotomous, 1–1 1/2 in. long; peduncle and branches of the cyme slender, glabrous; bracts minute, 1/3– 1/2 lin. long, glabrous; pedicels 1 1/2–2 lin. long, slender, glabrous. Sepals 1/3– 1/2 lin. long, deltoid-ovate, acute, glabrous. Corolla 5-lobed almost to the base, rotate, about 4 1/2 lin. in diam., white; lobes 2 lin. long, 2/3 lin. broad, linear-oblong, very obtuse, with revolute margins, glabrous on both sides. Coronal-lobes filiform, trifid, erect in the lower half, then abruptly bent inwards and divided into 3 at the bend, lateral divisions shortest, erect, middle one bent down and then upwards, all filiform, tortuous and intermingled over the top of the stamens and style; the entire lobe 1 1/2–1 3/4 lin. long, the undivided part rather more than 1/2 lin. long. Stamens about 1/2 lin. long; filaments very short, about 1/4 as long as the glabrous anthers, the lobules alternating with them very rudimentary and not forming a very evident ring.
