Purple or Madagascar rubbervine

Leaf blades 1.5–11.2 × 1–6.5 cm, glabrous or pubescent. Petioles 3–10 mm, glabrous or pubescent. Flowers: calyx lobes ovate to elliptic, 7–13(–14) mm, margins ± flat; corolla tube (9–)15–25 mm, lobes 20–44 × 12–26 mm, glabrous or pubescent; corolline corona 6–9 mm, entire; translator spathes lanceolate to ovate. Follicles 5–10 × 1–4 cm. Seeds 5–8.9 mm; coma 18.9–38 mm.

Flowering and fruiting year-round, mostly in summer. Disturbed areas; 0–40 m; introduced; Fla.; Indian Ocean Islands (Madagascar); introduced also in Mexico, West Indies, Central America, South America, Asia, Africa, Pacific Islands, Australia.

In Florida, Cryptostegia madagascariensis has been found sporadically outside of cultivation in the southern third of the peninsula.