250 CO^IPOSIT.E 



Tribe 3. Innloid^a. — Leaves scattered : ray-florets ligtdaie, yellow, 

 or absent : disk-florets tubidar, perfect, usually yelloio : anthers with 

 2 bristles at their base : pappus-ltairs generally slender , silky. 



7. FiLAdO. — Florets all tubular, the outer carpellate, the inner 

 perfect ; receptacle conical, with few scales at the margin ; pappus 

 of slender silky hairs, 



8. ^Vntennaria, — Heads sub-direcious ; florets all tubular ; 

 pappus hairy, that of the staininate florets with club-shaped hairs. 



9. GNArHAHUM. — Florets D.S in Filago ; receptacle flat, naked; 

 pappus of slender silky hairs. 



10. Inula. — Ray-florets ligulate, yellow, carpellate ; disk-florets 

 tubular, perfect ; receptacle naked ; pappus o{ one row of hairs. 



r I. 1-'i;lic-4ria. -Differing from Jnula chiefly in having an outer 

 row of short scales to the pappus. 



Tribe 4. Helianihoidecr. — Leaves opposite : ray-florets ligulate, 

 yellow, carpellate or neuter, or iihsent : disk-fl wets tubular, perfect, 

 generally yellow : receptacle scaly : anthers not tailed : pappus of a 

 few stiff scales or bristles. 



""12. Xanthium. — Heads n-Loncecious ] staminate florets many ; 

 anthers free ; carpellate florets 2, enclosed \>y the spinous involucre. 



13. EfuENS. — Ray-florets generally absent; if present, neuter; 

 pappus of 2 — 5 barbed bristles. 



*r4. Galixsch; A. — Ray-florets few, in one row; receptacle 

 conical ; pappus of one row of broad ciliate scales. 



Tribe V Antheinideu'. — Leaves scattered: ray-florets ligulate or 

 tubular : outliers not tailed : pappus absent or minute. 



15. Achillea. — Ray-florets few, ligulate, white, broad; receptacle 

 scaly ; fruit compressed ; no pappus. 



16. DiOTis. — Florets all tubular, perfect, with 2 persistent spurs 

 at the base of the corolla ; receptacle scaly ; fruit compressed ; no 

 pappus. 



17. AxTHEMis. — Ray-florets in one row, ligulate, white, oblong, 

 carpellate or neuter, or absent; receptacle convex, scaly; fruit 

 not compressed; no pappus. 



18. (j-rRvs.\N'THKMrJi. — Ray-florets in i row, ligulate, white or 

 yellow ; receptacle flat or nearly so, naked ; no pappus. 



79. Matricaria. — Ray-florets in i row, ligulate, white; recep- 

 tacle conical, naked ; no pappus. 



*2o. Conn, A. — Florets all tubular, the outer row carpellate ; 

 corolla 4-lobed, with 2 spurs at the base ; receptacle flat, naked ; no 

 pappus. 



