Erect villous or hirsute herb, 2-8 ft. high. Leaves alternate, oblanceolate to obovate-elliptic or oblong, crenate-serrate with minute mucros on the tips of the serratures, scabrid above, pubescent beneath, 4-8 in. long; petiole amplexicaul. Heads ½ to ¾ in. diam. with an involucre of 3-5 ovate rotundate bracts. Bahr El Ghazal Prov. (Jur Ghattas). Said to possess febrifugal and diuretic properties. 518 =Adenostemma viscosum= _Forst._ Herb, 2-4 ft. high. Leaves opp., ovate, cuneate at base, serrate or crenate-dentate up to 6 in. long; pet. up to 2½ in. long. Heads ab. ⅓ in. wide in usually viscous pubescent axillary and terminal panicles; cor. white. Bahr El Ghazal Prov. (Niamniam-land: Tuhami’s Zeriba). 519 =Ageratum conyzoides= _Linn._ Hirsute herb. Leaves opp., or upper alternate, ovate, obtuse, base narrowed, crenate, 1-3 in. long. Heads ¼ in. diam., in dense terminal panicled corymbs. Fl. white to lilac or purple. Khartoum Prov.; Fung Prov.; Bahr El Ghazal Prov. (Niamniam-land: by the Nabambisso River). An invading weed in most parts of the Tropics. 520 =Eupatorium africanum= _O._ & _H._ Pubescent. Leafy herb, 2-4 ft. high. Leaves alternate, ovate or ovate- lanceolate, base rounded, 3-nerved, 3 in. long. Heads ab. 5-flowered, ⅙ in. wide, in dense terminal, corymbose cymes, 1½-4 in. broad. Fl. white or purple. Bahr El Ghazal Prov. (Niamniam-land: south of Gumba). 521 =Mikania scandens= _Willd._ Twiner, ab. 40 ft. high. Leaves opp., from ovate to deltoid or hastate, base cordate or auricled, 1-5 in. long; pet. ½-5 in. long. Heads ab. ¼ in. long, subsessile in terminal and axillary corymbose panicles. Fl. purplish, white or pale yellow. Belgian Congo (Niamniam-land: near the Mbrwole River). _B. Flower-heads various, mostly_ (1) _heterogamous; outer (ray) florets, usually female, sometimes neuter, ligulate, tubular or filiform; inner (disk) florets tubular, hermaphrodite, rarely wholly sterile;_ (2) _homogamous by suppression of ray florets, tubular or campanulate and hermaphrodite;_ (3) _unisexual. Corolla white, largely yellow, but also pink, purple or blue._ 522 =Microtrichia Perrottetii= _DC._ Pubescent herb, 1 ft. high. Leaves alt., obovate, coarsely toothed, 1½ in. long. Heads many-flowered, small, yellow, heterogamous. Fl. tubular, denticulate, disk campanulate 5-fid. Bahr El Ghazal Prov. (Bongo-land: by the Tonj River near Addai). 523 =Dichrocephala latifolia= _DC._ Erect herb, 5 ft. high. Leaves alt., lyrate, 1½-3 in. long. Heads subglobose, heterog.; fem. fl. white, tubular, 2-3 dentate; hermaphr. fl. purple campanulate. Mongalla Prov. (Yei River); Bahr El Ghazal Prov. (Niamniam-land). 524 =Grangea maderaspatana= _Poir._ RIMITH (Meshra El Zeraf)—Arab; RUBEL—Rashida; KEIRANI—Hadendowa. Hairy herb up to 1 ft. Leaves alt., obovate, pinnatifid, ½-3 in. long. Heads yellow, small, 1-3 together, terminal or leaf-opposed, heterog.; fem. fl. narrow tubular, 2-4-fid; hermaphr. fl. campanulate, 4-5-fid.