Procumbent hairy herb, 6-24 in. long. Leaves opposite; oblong or elliptic-lanceolate, ½-2½ in. long. Heads axillary, ⅓ in. diameter, white; per. segm. ⅙ in. long; stamens 5, filaments united into a cup with alternate notched teeth. Kassala Prov. (Gallabat: Matamma); Fung Prov. (Jongol’s Post); Kordofan Prov.; Darfur Prov.; Upper White Nile Prov. (Kodok). =A. achyranthoides= _Forsk._ Leaves usually lobed, otherwise as above but per. smaller. Berber Prov. (Saggadi); Blue Nile Prov. (Wad Medani); White Nile Prov.; Bahr El Ghazal Prov. (Jur, Wau River); Bahr El Jebel. =BASELLACEÆ.= 114 =Basella alba= _Linn._ Glabrous, much branched, twining herb. Leaves alternate, ovate or cordate, 2-4 in. long, long-petioled, almost leafless in dry season. Flowers 2-sexual, in axillary spikes with 2 fleshy bractlets adnate to per.; per. fleshy, shortly 5-lobed; stamens 5; styles 3. Fr. globose, enclosed in enlarged per., 1/5 in. diameter, red, white or black. Bahr El Ghazal Prov. (Niamniam-land: by Nabambisso River). Cultivated as a Spinach. =LINACEÆ.= 115 =Linum strictum= _Linn._ Erect herb. Leaves linear, scabrid. Flowers yellow, small, in cymose corymbs. Capsule splitting into 5 2-seeded valves or into 10 1-seeded valves. Red Sea Prov. 116 =Hugonia platysepala= _Welw._ Shrub, 6-9 ft. high. Leaves alternate, shining above, broadly oblanceolate to obovate oblong, acute or cuspidate. Flowers in few flowered racemes, yellow, over 1 in. across; outer sepals with revolute margins; stamens monadelphous. Fruit globose, orange-coloured, ½ in. diameter. Belgian Congo (Niamniam-land: by the Yuru River). =ZYGOPHYLLACEÆ.= 117 =Tribulus terrestris= _Linn._ DREISA or DEREISA, GATHA (Egypt)—Arab; KÜRWAI—Nuer. Prostrate plant with opposite pari-pinnate leaves; fruit of 5 woody cocci, each with 2 pairs of stiff spines. Flowers solitary yellow. Sepals and petals 5 each, stamens 10, distinct. In most parts of the Sudan. The whole plant, especially the fruit, used medicinally as a diuretic. The leaves are occasionally eaten. =T. mollis= _Ehrb._ Like _T. terrestris_, but flowers very small, fruits densely pilose and with wings rather than horns at the base. Red Sea Prov. (21° N.L.); Khartoum Prov. =T. alatus= _Del._ GATHA (Egypt), DREYS—Arab; SHEISHIG—Hadendowa; GUTAB—Rashida. Prostrate herb; fruit spinosely and broadly winged, otherwise much like _T. terrestris_. Red Sea Prov. (Dongonab, etc.); Berber Prov.; Kassala Prov. (Um Adam). =T. pterocarpus= _Ehrenb._ Prostrate herb; fruit roundish winged, otherwise like _T. terrestris_. Dongola Prov.; Between Suakin & Berber (Obak). =T. cistoides= _Linn._ Like _T. terrestris_, but stigmatic lobes not longer than diameter of style. Fung Prov. (Jongol’s Post). =T. Ehrenbergii= _Asch._ Densely villous herb; wings of fruit toothed. Dongola Prov. 118 =Zygophyllum simplex= _Linn._