Slender twiner. Leaves narrowly cordate-ovate, acuminate, 1-2 in. long. Fl. 1-2 axillary, on long peduncles exceeding the leaves; cor. white or buff, funnel-shaped, ¾ in. long. Caps. glabrous. Kordofan Prov. (Obeid); Bahr El Ghazal Prov. (Jur Ghattas, Western Bongo-land & Niamniam-land: Nabambisso River). =I. acanthocarpa= _Hochst._ Glabrous twiner. Leaves cordate-ovate, 1-3 in. long; petiole 1-3 in. long. Peduncle 1-3 flowered; cor. white or pale-purple, funnel-shaped, 1 in. long. Caps. globose, tipped with persistent style base. Kordofan Prov. (Obeid); Nuba Mts. Prov. (near Talodi). =I. cf. I. acanthocarpa= _Hochst._ Fung Prov. (Jongol’s Post). =I. hellebarda= _Schwfth._ Tuberous-rooted twiner. Leaves very variable, ovate to sagittate or hastate, 2-3 in. long. Peduncle 1½-3 in. long, bearing a few-flowered cyme; cor. bright red-purple, 2 in. long, funnel-shaped, ab. 2 in. diam. Caps. globose; seeds 4, brown-velvety. Kassala Prov. (Gallabat: around Matamma); Bahr El Ghazal Prov. (Niamniam-land: Nabambisso River). =I. aquatica= _Forsk._ FARU (Meshra El Zeraf), ARKALA (Kordn.)—Arab; AFAT (Meshra El Zeraf)—Dinka. Hollow-stemmed trailing and twining herb, also floating on the water. Leaves cordate-ovate or hastate, 3-6 in. long, on long petioles. Peduncles 1-2 in. long, 1- few-flowered; cor. bright-purple, 2-3 in. long, funnel-shaped; limb spreading, 2½ in. diam.; capsule globose, ⅓ in. diam. Kassala Prov. (Gallabat: Matamma); Between Berber & Khartoum; Fung Prov.; White Nile Prov. (Wad Shellai and edges of the Nile); Kordofan Prov.; Bahr El Ghazal Prov. (Jur Ghattas); Mongalla Prov. Most parts of the Sudan, growing in or near water. The young shoots are eaten. It is the important factor in binding together Sudd plants. =I. near I. leucantha= _Webb._ Twiner with linear, hastate leaves. Cor. white with purple-lilac centre. Fung Prov. (Jongol’s Post); Mongalla Prov. (Bor). =I. repens= _Lam._ ABU HALAGIN—Arab; TARASHO—Bari. Trailing perennial with hollow stem, growing on muddy banks. Leaves cordate, orbicular or reniform, 3-6 in. diam.; petiole 1-4 in. long. Peduncles 1-4 in. long, bearing a few to many flowered cyme; cor. red or purple, funnel-shaped, 2-3 in. long. Capsule globose; seeds size of a pea. Blue Nile Prov.; White Nile Prov. (banks of the Nile); Kordofan Prov. (south, swamps); Darfur Prov.; Bahr El Ghazal Prov. (Jur-land); Mongalla Prov. =I. Batatas= _Lam._ BOMBAY—Arab; BAMBE (red var.) or AMBIRIA & BAZAMBE (white var.)—Zande. Sweet Potato. White, red or rarely yellow tuberous-rooted perennial. Leaves very variable, more or less trilobed, 3-4 in. long; petiole long. Cymes dense on long peduncles; cor. reddish, 1½ in. long, funnel-shaped. Kordofan & Mongalla Provinces and other parts of the Sudan. Cultivated for its tuber. =I. near I. Batatas= _Lam._ Fung Prov. (Jongol’s Post). =I. dissecta= _Willd._