=N. erecta= _Guill._ & _Perr._ Small herb on river banks, up to 10 in. high. Leaves opposite, linear ¾ in. long. Flowers magenta or purple: petals 4-6. Mongalla Prov. (Bor); Uganda (Nile Province). =N. cordata= _Hiern._ Riverside herb, up to 9 in. high. Leaves ovate to lanceolate, cordate at base, ½ in. long. Flowers in heads of 5 surrounded by 2 cordate bracts; petals pink. Bahr El Ghazal Prov. (Jur. Ghattas & Bongo-land: Gir); Bahr El Jebel (Madi Swamps). 130 =Ammannia senegalensis= _Lam._ TAMR EL FAR (Meshra El Zeraf)—Arab. Erect, branched herb with 4-winged stem. Flowers axillary, pink, 4-merous. Leaves linear-oblong to lanceolate, auricled, amplexicaul, 2-in. long, opposite. Blue Nile Prov.; Fung Prov. (Jongol’s Post); White Nile Prov. (near Abba Island, J. Arashkol); Kordofan Prov.; Bahr El Jebel (Madi); Darfur Prov. (Zalingei: Wadi Azum). The plant is used as a blistering agent. =A. baccifera= _Linn._ Erect herb with 4-angled stem. Leaves opposite, linear-lanceolate, 2 in. long. Cymes 3-7. Flowers sub-sessile, axillary; calyx 4-lobed; petals 4 or 0; stamens 4; capsule globular, dehiscing transversely about the middle. Dongola Prov. (between Dongola & Korti); between Khartoum & Shendi; Khartoum Prov.; White Nile Prov. (J. Arashkol); Kordofan Prov.; Bahr El Ghazal Prov. (Jur Ghattas). The leaves are used for blistering, but the effect is said to be most painful. =A. salicifolia= _Monti in Comment._ Marsh herb, 18 in. high, with 4-angled stem. Leaves opposite, lanceolate. Flower small, in dense cymes, whorled, 4-9 in each axil. Capsule 1-celled. Red Sea Prov. (21° N.L.); between Khartoum & Shendi). =A. urceolata= _Hiern._ Erect annual with 4-angled stem. Leaves opposite, linear, ½ to 2 in. long. Flowers in dense axillary clusters, 6 in each axil. Capsule 1-celled. White Nile Prov. (J. Arashkol). 131 =Lawsonia alba= _Lam._ HENNA—Arab. Glabrous shrub; branches angular, sometimes spinescent. Leaves opposite, nearly sessile, elliptic, ab. 1 in. long. Flowers in long axillary or terminal panicles, small, greenish yellow, smell like mignonette. Berber Prov.; Khartoum Prov.; Blue Nile Prov.; Kordofan Prov.; Upper White Nile Prov. (Sobat River, Tawfikia). Introduced. The leaves are used to dye the finger nails and the palms of the hands an orange colour. The seeds yield an oil. =PUNICACEÆ.= 132 =Punica granatum= _Linn._ RUMMĀN—Arab. The Pomegranate. Shrub or small tree with large scarlet flowers. Fruit size of an orange; seeds surrounded by a pink, edible pulp. Introduced from Asia. =ONAGRACEÆ.= 133 =Jussieua diffusa= _Forsk._ Procumbent aquatic herb, usually supplied with pale pinkish spindle- shaped floats. Leaves alternate, linear-lanceolate to lanceolate, narrow at base. Flowers yellow; calyx 5-lobed, enlarged in fruit; pet. 5; stamens 10. White Nile, Bahr El Ghazal & Mongalla Provinces.