Marsdenia dressleri Spellman

Glabrous vines. Leaves elliptic to occasionally ovate, dark green and subnitid above, lighter beneath, apically short acuminate, basally rounded, 10-12 cm long and 4.5-6 cm wide, the midvein thickly prominent, with 3 pairs of more prom-inent lateral veins which merge to form an irregular marginal vein; petioles 1-1.5 cm long. Inflorescences umbelliform, ca. 10-flowered, glabrous; peduncles ca. 3 mm long; pedicels 2-3 mm long. Flowers red-brown, ca. 7-8 mm long; calyx lobes imbricate when expanded, thickened, suborbicular, glabrous except for the ciliate margins, 2.5 mm long, equally wide; corolla tube cylindrical 5-6 mm long, glabrous outside, retrorsely pubescent in clusters of hairs inside, weakly strigose at the mouth, the lobes elliptic, 3-4 mm long and 2-3 mm wide, glabrous,