Stems erect to 70 cm high, unbranched, puberulous at first. Leaves thick and fleshy when fresh but becoming membranous when dried, acute, the lower narrowly elliptic-lanceolate, with cuneate base, the upper broadly lanceolate to elliptic, with cordate base, (6-)12-16 by (3-)4-5 cm, glabrous except for the main veins beneath. Inflorescence a terminal bifurcate raceme c. 18-20 cm, puberulous; pedicels 3-5 mm, puberulous. Flowers greenish-white with purple spots inside, to over 3 cm long, infundibuliform, glabrous, segments linear-oblong to oblong spathulate. Filaments 16-18 mm long; anthers 3 mm long, yellowish-brown. Ovary 10 mm long; style 8 mm, its branches 8 mm long, purple, spreading, tuberculate on the inner surface. Fruit c. 25-30 by 4-6 mm. Seeds flat, oblong, c. 2 mm long.