Order 64. Composites. 151 



1. VERNONIA. Bracts in many series, inner longest, achenes 

 generally ribbed or angled, pappus of many hairs, 



2. ELEPHANTOPOUS. Rigid herbs, flowers -of 2 to 5 florets 

 clustered into heads, bracts about 8, dry and stiff, corolla equally 

 4-lobed, cleft on one side, achenes truncate, 10-ribbed, bristles 

 of pappus rigid. 



3. ADENOSTEMMA. Smooth or glandular herbs, leaves mostly 

 opposite, bracts many in one or two series, tube of florets short, 

 achenes 5-ribbed glandular, pappus hairs few and short. 



4. AGERATUM. As the last, but bracts in 2 or 3 series, 

 achenes 5 -angled, pappus various. 



TRIBES 3 and 4. A^TEROIDE^ and INULOIDE^;. Floweis 

 usually yellow, florets all tubular, or the outer (female) ligulate, 

 inner hermaphrodite (except Ca?sulia), receptacle almost 

 always naked. 



5. DICROCEPHALA. Annuals, flowers very small, not rayed, 

 outer florets in many series, bracts in one series, achenes com- 

 pressed without pappus. 



6. CYATHOCLINE. Strong smelling annuals, flowers small, 

 not rayed, receptacle elongated concave at the top, bracts in one 

 or two series, florets as in the last, achenes minute, oblong, 

 smooth, without pappus. 



7. GRANGEA. Softly hairy herbs, flowers roundish, not 

 rayed, outer florets filiform, tube very slender, bracts in few 

 series, outer herbaceous, pappus cup-shaped. 



8. CONYZA. Ray florets filiform, rarely strap-shaped, 2 or 3- 

 toothed, inner tubular 5-toothed, involucre bell- shaped. 



9. ELUMEA. Glandular pubescent or woolly herbs, flowers in 

 racemes or panicles, outer florets many filiform, inner few 

 tubular, bracts in many series, narrow. 



10. LAGGERA. As the last, but centre of many florets. 



11. SPH^ERANTHUS. Low branched annuals with winged 

 stems, flowers in close round clusters, bracts mostly chaffy, 

 achenes large, angled. 



12. GNAPHALIUM. Hoary or woolly herbs, florets all fertile, 

 outer filiform and numerous, bracts scarious in many series. 



13. VICOA. Flowers woolly, ray florets narrow, involucre 

 bell-shaped, bracts in many series narrow, inner scarious. 



14. PULICARIA. As the last, but bracts in few series, narrow, 

 pointed or awned, pappus double. 



15. CESULIA. A smooth inarsh herb, flowers in axillary 

 sessile round heads, surrounded by floral leaves, florets tubular, 

 bracts only two, pappus none. 



