CO^tPOSlTE FAJIILY 



251 



2 1. Tanacetum. — Florets all tubular ; receplcuie naked, broad; 

 friiil with a broad epigynous disk ; no pappus. 



22. Artemisia, — Florets few, all tubular; receptacle naked, 

 narrow ; Iriiit with a small epigynous disk ; no /^appiis. 



Tribe 6. Senecionidea:. — Leaves scattered: ray-florets Uf^idate, or 

 absent : receptacle naked : anthers not tailed : pappus usually of very 

 soft hairs. 



23. TussilAgo. — Leaves all radical ; heads solitary, many- 

 flowered ; outer florets ligulate. 



24. Petasi'tes. — Leaves all radical ; heads numerous, in a 

 raceme, many-flowered ; outer florets tubular. 



*2 5. DoRONfcuii. — Involucral bracts in 2 or 3 rows, equal ; 

 ray-florets in i row, ligulate, without pappus ; florets all yellow ; 

 pappus of the disk-florets of several rows of stiff hairs. 



26. Sex^cio. — Involucral bracts in i row, equal; florets all 

 yellow ; ray sometimes absent ; pappus of several rows of soft, 

 slender hairs. 



Tribe 7. CynaroidecF. — Leaves scattered, 2is\ially spinous : bracts 

 imbricate, spinous : florets all tubular and usuhlly perfect : receptacle 

 scalv ; pappus generally present. 



27. Caru'na. — Ou.ter bracts spinous ; inner chaffy and spreading ; 

 anthers tailed ; pappus in i row, branched and feathery. 



28. Akctium. — 7)?z/o/;/(-re globose ; outer bracts hooked ; anthers 

 tailed ; pappus in several rows of short simple hairs. 



29. C.ARDUUS. — Leaves decurrent ; bracts spinous; anthers 

 scarcely tailed ; frmt compressed ; pappus in many rows of long, 

 equal, rough hairs. 



-30. Onopordum. — Differing from Cdrduus mainly in its 

 honeycombed receptacle and 4-angled fruit. 



31. SiLYEUM. — Resembling Cdrduus, but with united filaments 

 and silky pappus. 



32. Saus-SUREa. — Bracts not spinous ; anthers tailed ; pappus in 

 2 rows, outer bristly, inner longer, feathery. 



33. Serratula. — Bracts not spinous ; 'anthers not tailed ; 

 pappus in several rows of long unequal haiis, the inner 

 longest. 



34. Centaurea. — Outer florets usually large, unsym metrical 

 and neuter; pappus in several rows of short unequal hairs, the 

 second row longest, or rarely absent. 



