Small tree; fruit 4-winged; shoots sometimes twining. Leaves ovate- lanceolate, acute, 4 in. long, 2 in. broad, glabrous. Nuba Mts. Prov. (J. Daier). 884 S.G.H. =C. sp.= GOAK—Dinka; BOADUN—Burun. Upper White Nile Prov. (Goz El Siada). =RHIZOPHORACEÆ.= 192 =Rhizophora sp.= Probably =R. mucronata= _Lam._ Mangrove. Leaves obovate-elliptic, long-mucronate, leathery, about 4½ in. long and 2 in. broad. Flowers few. Sepals oblong, leathery. Petals hairy inside. Seeds germinating before falling. Muddy shores of Red Sea, south of Suakin. 193 =Bruguiera gymnorrhiza= _Lam._ Tree with smooth bark, marked on young branches with scars of leaves and stipules. Leaves rather thick, oval, bright green. Fruit scarlet, 1 in. long. Seeds germinating before falling. Muddy shores of Red Sea, south of Suakin. =HYPERICACEÆ.= 194 =Hypericum Lalandii= _Choisy._ Small tufted herb, under 10 in. high. Leaves lanceolate or linear- oblong, about ¼ in. long, gland-dotted. Flowers yellow in dichotomous cymes. Mongalla Prov. (Yei River). =H. perforatum= _Linn._ Somewhat woody plant with perennial stock. Leaves with translucent and some dark dots; corolla yellow with black dots. Stamens polyadelphous. Darfur Prov. (J. Marra, over 6,000 ft.). 195 =Psorospermum salicifolium= _Engl._ Leaves lanceolate, acute, 2 in. long, ½ in. broad, glabrous. Flowers in small close cymes. Sepals and petals streaked with resin, the latter densely hairy inside. Bahr El Ghazal Prov. (Mittu-land: Kutshuk Ali & Kuragera); Niamniam (Tuhami). =P. senegalense= _Spach._ Shrub; twigs and young leaves rusty tomentose. Flowers in dense corymbs, white, streaked with brown; stamens 5-adelphous. Leaves opposite or alternate, elliptic. Bahr El Ghazal Prov. (Dar Fertit). =P. tenuifolium= _Hook. f._ Glabrous shrub. Leaves elliptic, opposite, opaquely punctate, 2-4 in. long. Flowers in terminal corymbs; stamens 5-7-adelphous. Fung Prov.; Bahr El Ghazal Prov.; Mongalla Prov. (Yei River). 196 =Haronga madagascariensis= _Chois._ KAWA (Mongalla Prov.)—Makraka. Shrub or small tree. Leaves opposite, entire, rusty tomentose when young, ovate-oblong, connected by an interpetiolar ridge. Flowers small, 5-adelphous, in broad terminal corymbose cymes. Bahr El Ghazal Prov. (Bongo-land: Khor Tela, between Wau & Tonj, and near the Mongo-longbo stream); Mongalla Prov. (Yei River). The fruit is edible; the seeds are used in French Guinea in cookery. The wood is of great beauty, it works well and finishes without trouble. A yellow dye is obtained from the inner bark of the tree. It is found in Mongalla Prov., frequently associated with _Berlinia acuminata_. =GUTTIFERÆ.= 197 =Garcinia sp.=