1. Antigonon leptopus Hooker & Arnott in Bot. Beech. Voy. 308.t. 69. 1841; Bailey, Man. Cult. Pl. (Rev. Ed.) 351. 1949; Pal, Beaut. Climb. Ind. 27. 1960; R.R.Stewart, Ann. Cat. Vasc. Pl. W.Pak. Kashm. 201. 1972; Bhopal & Chaudhri, l.c. 64.
Corculum leptopus (Hook. & Arn.) Stuntz in U.S.Dept. Agr. Bur. Pl. Ind. 282: 84. 1913.
Woody climber, with tuberous root, stem angular, glabrescent. Leaves alternate, blade 3-8 cm long, 1.5-5 cm broad, hastate-ovate, triangular or cordate-ovate, simple, hairy above, densely towards margin, glabrescent below; petiole 1-2 cm long. Inforescence a raceme ending into a branched tendril. Flowers showy; pedicel 3-8 mm long with sparsely spreading simpe hairs. Perianth segments 5, bright pink, 6-15 mm long, 3-7 mm broad, very reticulately veined. Stamens 8, 3-7 mm long, sparsely hairy throughout; anthers oblong. Carpels 3; ovary ovoid, trigonous, glabrous, 3-4 mm long; styles 3 with capitate stigma. Nut c. 5 mm long.
Type: Oaxaca in Mexico, Lay & Collie.
Distribution: Native of Mexico, commonly cultivated in Pakistan and other parts of the world for showy bright pink flowers.