Annual, up to 6 ft. high, viscid all over. Leaves lanceolate to ovate, lower up to 2 ft. long, amplexicaul. Panicle terminal; fl. 5-merous; cor. pink, white or pale yellow; tube long. Caps. conical. Fung Prov.; White Nile Prov.; Nuba Mts. Prov.; Kordofan Prov.; Upper White Nile Prov. (Sobat); Bahr El Ghazal Prov. (Jur Ghattas); Darfur Prov. Cultivated. The leaves are very imperfectly cured by the natives, and are very rank and coarse. The plant grows freely and yields heavily. =N. rustica= _Linn._ DUKHĀN—Arab; DĀ (J. Ghulfan)—Nuba; MASHIR—Bongo. Differs from above by smaller leaves and greenish-yellow flowers in closer panicles. Fung Prov.; Nile Banks (17° N.L.); Kordofan Prov. (Bara); Darfur Prov.; Bahr El Ghazal Prov. (Jur Ghattas); Nuba Mts. Prov. The principal tobacco of the Nile Basin, cultivated for smoking and chewing. The Nicotine content is low. 617 =Schwenkia americana= _Linn._ Much branched, pubescent herb. Leaves alt., lower ovate and petioled, upper oblong and sessile, ¾ in. long. Panicle lax, terminal; calyx 5-toothed; cor. pale violet, 5-toothed, 2 upper longer, total length ⅓ in.; stamens 4, didynamous. Caps. subglobose, ¼ in. long. Bahr El Ghazal Prov. (Kutshuk Ali, Jur Ghattas & Niamniam-land: Nabambisso River). Used as a fish poison on the West Coast. =S. hirta= _Klotzsch._ Hirsute herb, 2 ft. high. Leaves ovate or oblong, ⅔ in. long. Panicle large, lax; cor. tubular, under ½ in. long, pale violet or yellow, lobes equal; st. 2. Caps. ¼ in. long. Bahr El Ghazal Prov. (Wau). =CONVOLVULACEÆ.= 618 =Ipomœa verticillata= _Forsk._ Herbaceous twiner. Leaves alt., as in all this order, cordate-ovate, 1-2 in. long, pubescent. Fl. 1-2, on short pedicels, on axillary peduncles; cor. whitish, subcampanulate, ¼ in. long; midpetaline area well defined as in all the genus. Capsule globose, ⅓ in. diam., glabrous. Between Kassala & Goz Regeb; Berber Prov. (Zeidab); Khartoum Prov. (Burri); Blue Nile Prov.; White Nile Prov. (J. Arashkol). =I. eriocarpa= _R. Br._ Pubescent twiner. Leaves from cordate-ovate to linear-oblong, 1-5 in. long. Fl. in sessile axillary clusters, 5-merous; sepals hairy, ¼ in. long; cor. white, pink or purple, ab. ⅓ in. long. Capsule globose, hairy, ¼ in. diam. Kassala Prov. (Gallabat: Matamma); Berber Prov. (Metemma); Khartoum Prov.; Kordofan Prov.; Bahr El Ghazal Prov. (Bongo-land: Gir); Fung Prov. (Jongol’s Post). =I. sulphurea= _Hochst._ Trailing herb, pubescent. Leaves elliptic-ovate, obtuse, 1-2 in. long, usually shallowly cordate. Fl. axillary, clustered; cor. sulphur-yellow, ¼ in. long. Capsule globose, hairy, ¼ in. diam. Kordofan Prov. (Obeid & Abu Helafi). =I. curtipes= _Rendle._ Finely pubescent twining herb. Leaves linear-oblong, cordate-ovate below, 1-2 in. long. Fl. axillary, solitary on ¼ in. pedicel; cor. purplish, hairy, funnel-shaped, ½ in. long. Bahr El Ghazal Prov. (Jur Ghattas). =I. blepharophylla= _Hallier f._