Composite. ] Composite. 
Poce 3.— 
LXX.—COMPOSIT/. 
20. 
Heads unisexual 
Heads bisexual : 
Heads discoid (not rayed); fl. all tubular 
(see also 25 and 26): 
Involucral bracts connate into a pseudo- 
Galys:  . F 
Involucral bracts free : 
Fl. all bisexual : 
Anther bases cleft or tailed : 
Style arms subulate; fls. purple or 
white ; achenes 10-ribbed (Ver- 
noniee) : 
Heads many-flowered; pappus 
long of slender hairs : 
Heads 4-flowered; fils. crowded 
into dense masses; pappus 
chaffy : 
Style arms truncate ; pappus of 
long hairs 
Style arms acute; achenes_ 2-3- 
angled; pappus small . 
Anther bases not cleft or tailed : 
Style arms clavate; achenes 
ribbed (Eupatoriee) : 
Anther-tips truncate ; 
Anther-tips appendiculate : 
Pappus paleaceous; erect 
plants : 
Involucral bracts 2-3-seriate ; 
capitula many-flowered 
Involucral bracts subuniseri- 
ate; capitula 5-flowered 
Pappus of slender hairs ; climb- 
ing plants 
Style arms jes tapering, hairy 
Style arms truncate; tipped with a 
conical tuft of hairs : 
Fis. violet : 
Fls. pale yellow . : 
Outer or lower row of flowers female : 
Anther cells not tailed or sagittate at 
base : 
Pappus of long hairs: 
Style arms flattened 
Style arms truncate : 
Pappus none, or a few bristles, or a 
ring : 
5- 
. 8b. 
5 o3an. 
4 DAs 
10. 
. 29a. 
157 
XANTHIUM. 
Lagascea. 
. VERNONIA. 
. ELEPHANTOPUS. 
Carduus. 
Eleutheranthera. 
. ADENOSTEMMA. 
. Ageratum. 
. Stevia. 
. Mikania. 
. GYNURA. 
. EMILIA. 
. NOTONIA. 
CONYZA. 
Erechtites. 
Part III. 
