LXXV. COMPOSITE. 
179 
Involucral bracts not glandular. 
Heads axillary, sub-sessile; flowers 
bright yellow . . 
Heads pedunculate, conspicuously ovoid 
conical ..... 
Heads depressed; pappus scaly cupular 
or short bristly. 
Flower-heads and rays white, very 
small; pappus o 
Flower-heads and rays yellow, larger. 
Pappus small .... 
Pappus hair-like plumose, heads 
long-stalked .... 
Flower-heads discoid; flowers all tubular; leaves 
alternate. 
Flowers all perfect bisexual; pappus of long 
hairs conspicuous. 
Style arms subulate, shortly hairy ; flowers 
violet; involucral bracts in 
several rows; herbs or trees 
Style arms tapered hairy; flowers orange; 
involucral bracts in one row with 
a few very short ones at base 
Style arms truncate tipped with hairs in a 
tuft; flowers pink, involucral 
bracts ih one row . . 
Outer flowers imperfect, female; involucral 
bracts in one row; flowers dark 
pink ..... 
Leaves sessile; stem clasping 
Leaves not sessile nor stem clasping. 
Herbs shrubby at base; flowers yellow; 
bracts thin .... 
Bush much-branched; flowers violet; bracts 
rigid. 
Flowers imperfect; pappus none or of 2 to 3 
short bristles; herbs. 
Flower-heads panicled, *15 in. wide; pappus o 
Flower-heads solitary, ’25 in. across; pappus o 
Heads '3 in. across; pappus very small 
Heads *1 in. wide; pappus o 
Flower-heads radiate. 
Outer flowers only ligulate. 
Erect, heads lax-panicled or racemose . 
Climber; heads densely clustered 
All flowers ligulate, yellow .... 
12. Synedrella 
13. Spilanthes 
14. Eclipta 
15. Wedelia 
16. Tridax 
17. Vernonia 
18. Gynura 
19. Emilia 
20. Erechthites 
21. Laggera 
22. Blumea 
23. Pluchea 
24. Dichrocephala 
25. Epaltes 
26. Grangea 
27. Centipeda 
28. Erigeron 
29. Microgloss a 
30. Crepis 
1 . SPARGANOPHORUS, Gaertn. 
Herb. Leaves alternate, membranous. Heads small 1 or more 
in axils, sessile. Flowers small, white, all similar. Involucre 
hemispheric, bracts in many rows, edges scarious. Achenes 
glandular crowded with a cartilaginous cup. Pappus o. Species 
1, tropical America, now a weed in Africa and Asia. 
(1) S. VaiUantii DC. Prodr. v. 12. 
Herb rather fleshy about 1 to 2 ft. tall. Stem hairy. Leaves 
lanceolate or ovate-lanceolate crenulate long, narrowed to base. 
