Woody twiner. Leaves opp., oblong or elliptic-oblong, 2-5 in. long, shortly pointed at apex, emarginate or cordate at base, whitish tomentose beneath. Panicles 2½-6 in. long; sepals minute, brick-red; cor. lobed nearly to base; lobes ¼ in. long; coronal lobes filiform, nearly ½ in. long. Follicles 2, horizontally diverging, lanceolate, tapering to a point, ab. 3 in. long. Fung. Prov.; White Nile Prov.; Bahr El Ghazal Prov. (Jur Ghattas, Niamniam & Bongo-lands); Mongalla Prov. (Gondokoro). Yields a kind of Gutta-Percha. =T. sp.= ARKALA—Arab. Branches pubescent. Leaves oblong-elliptic, truncate, mucronate, 3 in. long, 2 in. broad, whitish pubescent below. Flowers not seen. Upper White Nile Prov. (Kaka). 441 =Raphionacme jurensis= _N.E. Br._ Procumbent trailing shrub, with puberulous branches. Leaves not seen. Flowers solitary or in pairs, grey-lilac; pedicels 3-5 in. long, puberulous. Corolla lobes ¼ in. long, thinly pubescent outside. Bahr El Ghazal Prov. (between Jur & Wau Rivers). =R. sp. near R. jurensis= _N.E. Br._ Similar to above but erect from a long tuber, sometimes leafy at time of flowering. Leaves oblanceolate, 2 in. long, subacute. Corolla whitish green with 2 purple spots at base of each lobe; filaments purple. Mongalla Prov. (Bor & southward). 442 =Omphalogonus calophyllus= _Baillon._ Glabrous twiner. Leaves ovate, rounded or widely cordate at the base, acutely acuminate, 3-6 in. long, 2-4½ in. broad, with 12-14 lateral nerves. Cymes axillary, few flowered. Calyx cupular, lobes 1/12 in. long. Corolla lobes elliptic, ⅓ in. long. Mongalla Prov. (Yei River); Bahr El Ghazal Prov. (Niamniam-land). 443 =Periploca aphylla= _Decne._ MAGOK—Hadendowa. Shrub with short, stiff, usually leafless branches, young shoots bearing oblong or linear-oblong leaves, ½ in. long. Cymes 5-20 flowered, terminal; cor. ½ in. diam., rotate; lobes ¼ in. with white hairs near margin; coronal lobes ¼ in. long, each with 2 wing-like keels; anthers connate at tip over the style. Follicles 2 spreading, 3-4 in. long. Red Sea Prov. (Suakin, 21°-22° L.N.). The fibre is used in India for well-ropes, being considered impervious to the action of water. The flower-buds are eaten raw or cooked. The latex is applied to tumours and swellings. =P. linearifolia= _Dill._ & _Rich._ Shrub with whip-like branches. Leaves linear, acute, about 2 in. long and ⅙ in. broad, 1-nerved. Flowers in lax cymes. Corolla-lobes densely ciliate on the margins. Mongalla Prov. (Yei River). 444 =Secamone Schweinfurthii= _K. Schum._ Climbing shrub. Leaves opp., elliptic to orbicular, ⅓-1¼ in. long. Cymes 3-6 fld., axillary and terminal; cor. under ¼ in. diam., with minute coronal lobes. Foll. 2, spreading, glabrous. Bahr El Ghazal Prov. (Bongo: Kulongo). 445 =Podostelma Schimperi= _K. Schum._