Woody climber; stem smooth, shining. Leaves deeply cordate, entire to 3- or obscurely 5-lobed, ¾ in. long and wide; pet. 1-4 in. long. Flowers in short axillary racemes; per.: lower part obliquely ovoid, 1½ in. long, tube curved, 2 in. long, ½ in. diam., ciliate at throat, lobes 3, sub- equal, patent, triangular-caudate, 2 in. long, anthers and stigmas 10. Fruit about 1 ft. long and 1½ in. diam. Mongalla Prov. (Yei River). =HYDNORACEÆ.= 24 =Hydnora sp.= TARTŪS—Arab. Parasitic, fungus-like plant with a fleshy, warted, subterranean rhizome. Flowers large evil-smelling. Kassala, Blue Nile & Fung Provinces. Parasitic on roots of Acacia sp. The rhizomes contain a large percentage of tannin and are used medicinally as an astringent in dysentery and also for tanning skins. =PIPERACEÆ.= 25 =Piper umbellatum= _Linn._ Erect shrub, 4-5 ft. high; branches jointed at the nodes. Leaves reniform, 3-12 in. across, cuspidate, deeply cordate, basal nerves 11-13; pet. sheathing at base. Umbels of 2-7 spikes on short axillary peduncles. Flowers minute 2-sexual; per. 0; stamens about 3; stigmas 3; fr. trigonous; bracts suborbicular, ciliate. Bahr El Ghazal Prov. (Niamniam-land: near Nakofo River). =P. guineense= _Schum._ & _Thonn._ Stout woody creeper, climbing by means of densely hairy adventitious rootlets. Leaves ovate, acuminate, cordate to cuneate, 4-5 in. long, glabrous except under the nerves; petals up to ¾ in. Spikes solitary, leaf-opposed, in fruit up to 4 in. long; bracts rotundate, peltate; per. 0; stigmas 3. Fr. globose, mucronate, about ⅙ in. diam. Bahr El Ghazal Prov. (Dar Fertit: Deim Guju, Niamniam-land: Rivers Boddo, Atasilli & Kalensho). =P. capense= _Linn. f._ ADURAKA—Zande. Erect or climbing shrub; branches swollen at the nodes. Leaves ovate, shortly acuminate, about 4 in. long, base cordate or rounded, pellucid- dotted, 5-7 nerved, villous beneath on nerves; petals about 1 in. long. Catkins at end of short lateral branches appearing to spring from middle of petiole, about 2 in. long; peduncles about ¾ in. long; bracts peltate; per. 0; stamens 2-3, anther-cells with wide connective stigmas 2, recurved. Fr. obtuse, compressed, sessile. Mongalla Prov. (Yei River); Bahr El Ghazal Prov. (Niamniam-land). 26 =Peperomia knoblecheriana= _Schott._ Succulent glabrous annual, 1-2 ft. high. Leaves, except 2 lowest, alternate, rotundate-ovate, ⅛ in. long, subcordate. Spikes solitary and terminal, lax, ¼ in. long; flowers 8-12; per. 0; stamens 2. Berry subglobose, minute, blackish. Banks of the Bahr El Jebel (5°-7° Lat. N.). =PAPAVERACEÆ.= 27 =Argemone mexicana= _Linn._ Herb; leaves prickly; flowers yellow. Capsule with 4-7 placentas, dehiscing at apex into short valves. Red Sea Prov.; Khartoum Prov. Introduced.