300 LXXIII. COMPOSIT# (OLIVER AND HIERN). [Adenostemma. 
angular, striate, glabrous or glandular-puberulous. Leaves ovate, 
acute or obtuse, cuneate at the base into petiole, serrate- or crenate- 
. dentate, membranous, scaberulous or glabrate, ranging up to 6 in. long 
by 8} in. wide, upper smaller and fewer ; petioles ranging up to 2 in, 
long or more, upper and in some forms all shorter. Capitula 7-% 1. 
wide, on unequal usually slender pedicels, sometimes 13 in. long, 
loose or rarely rather dense dichotomous usually viscous-pubescen 
axillary and terminal panicles. Scales of involucre oblong, sub-biscre 
equal, blunt, nearly glabrous. Corolla white. Achenes more or DC. 
muricate or tuberculate or rarely quite smooth.—A. Perrottetu, 0 
1.c.110. A. mauritianum, DC. lc. 110. A. Dregei, DC. lc. Ul 
A. caffrum, DC. 1.c. 112. A. natalense, DC. 1.¢. 112. A. Schein 
Sch. Bip. in Pl. Schimp. Abyss. § i. n. 112 (Inflorescence rathe 
dense). 
f is omitted. . 
Dypee Galuee, Peels Bons 8000 ft. alt.; Mann! Cameroon Mountains, 
2500-7500 ft. alt., Mann! Niger, Barter! Sierra Leone, Afzelius / 
Wile Land. Abyssinia, Schimper! Niamniam-land, Schweinfurth ! 
Lower Guinea. Congo, Chr. Smith! Loango, Soyaux! 
10. AGERATUM, L.; Benth. et Hook. f. Gen. Pl. ii. 241. 
Capitula homogamous. Involucre campanulate ; scales 2 8-seria 
linear, acute, subequal ; receptacle convex (or plane), naked (or F the 
ceous). Corolla tubular, slightly dilated above and narrowed wi yr 
5-toothed mouth. Anther-base obtuse, tip ovate. Achenes i) met 
gular ; pappus of 5-4 scaberulous sets, dilated and lanceolate at on 
(or setee connate below or 10-20 narrower).—Herbs. Leaves oppo : 
or upper alternate. Capitula small or medium in paniculate corym"™ 
Flowers blue purplish or white. 
. ed 
Confined to America with the exception of the following species, a common be 
throughout the warmer regions of the globe. 
l. A. conyzoides, LZ. ; DO. Prodr. v. p. 108. Erect branching ot 
nual, varying to 3 ft.; branches subterete, finely striate, hirsute @ os 
Leaves ovate, obtuse or subacute, base abruptly or obtusely arre ng 
crenate or crenate-serrate, 1-8 in. long, 4-2 in. broad ; petiole ae ot 
to 1 or 2 in., often much shorter. Capitula 4 in. diam., 10 black, 
terminal panicled corymbs. Involucre nearly glabrous. Achenes 
glabrous or obsoletely setulose. 
Widely spread in Tropical Africa. 
11. EUPATORIUM, L. ; Benth, et Hook. f. Gen. Pl. ii. 24. 
or 
Capitula homogamons, few or many-flowered. Involucre oblong 
various, scales pauci- or multi-seriate, imbricate, outer gradually eae 
or all subequal. Receptacle naked. Corolla regular, in the obtuse 
species slightly dilated to the shortly 5-fid mouth. Anther-base ghtly 
or subtruncate, -tip short, ovate. Style-branches elongate, 
