Rootstock woody. Stems of the type specimens 8–10 in. high, erect, reddish-brown, rough with minute raised points; but according to Welwitsch's note on the label it forms a decumbent, scrambling or rarely twining shrub, 2–4 ft. high, with milky juice. Leaves ascending or somewhat spreading, perfectly glabrous; petiole 1–2 lin. long; blade 1–2 in. long, 3–6 lin. broad, lanceolate, acute, cuneate at the base, not 3-nerved. Cymes axillary, sessile or subsessile, densely many-flowered; bracts minute, rounded, very minutely ciliate; pedicels 1–1 3/4 lin. long, rather thick. Sepals 3/4 lin. long, 1/2 lin. broad, oblong, obtuse, very minutely ciliate. Corolla obtuse in bud, quite glabrous, white, fragrant; tube 1/2– 2/3 lin. long, campanulate; lobes 1 1/2–1 2/3 lin. long, 2/3 lin. broad, oblong, obtuse; sinus-pockets produced into filiform processes 3/4 lin. long, giving the appearance of two series of coronal-lobes, apparently slightly tortuous. Coronal-lobes arising above the middle of the corolla-tube, 3/4–1 lin. long, subulate, acute, slightly curved somewhat like the letter S. Anthers acuminate, connivent or connate in a cone.
