COMPOSITE ' 135 



SERIES A'. TUBULIFLOR^. 



Corolla tubular in perfect flowers, the ligulate flowers, when pres- 

 ent, being arranged about the margin (ray-flowers) and having pistils 

 only, or neither stamens nor pistils (neutral). 



* rtOWERS ALL ALIKE AND TUBULAR. 



1. Eupatoiium, flowers few in a head; marsh herbs. 



2. Liatris, flowers bright reddish-purple; scales of the involucre much 

 overlapped. 



3. Antennaria, heads dioecious, drying without wilting. 



4> Cirsium, heads many-flowered, leaves armed with prickles. 



5. Arctium, bracts of the involucre armed with hooks. 



6. Bigelowia, heads small, 4-7-flowered ; a shrub. 



** Flowers both tubular and radiate; receptacle naked. 

 t Ray-flowers yellow. 



7. Gutierrezia, heads small, numerous; low, often matted herbs, rather 

 woody at the base. 



8. Grindella, heads large, flowers all perfect; coarse herbs with toothed 

 leaves. 



9. Solidago, heads small, 8-10-flowered, numerous in showy clusters. 



10. Aplopappus, heads many-flowered; pappus of numerous bristles of 

 unequal length. 



11. Chrysopsis, heads many-flowered; pappus in two rows, the outer 

 much shorter than the inner. 



12. Arnica, heads large, showy; pappus stiff, leaves opposite. 



13. Senecio, heads showy, pappus soft and copious, leaves alternate. 



14. Tanacetum, marginal flowers short-rayed, pistillate; strong-smelling 

 herbs. 



tt Ray-flowers not yellow. 



15. Townsendia, heads large, many-flowered, rays in a single row ; tufted 

 stemless herbs. 



16. Aster, heads usually large, rays showy, pappus long and plentiful. 



17. Erigeron, heads many-floWered usually on naked peduncles; in- 

 volucre of two rows of bracts. 



18. Petasites, heads on stems appearing before the leaves, pappus very 

 plentiful. 



19. Artemisia, heads small, drooping, crowded; pappus wanting ; scented 

 herbs. 



20. Matricaria, heads large, rays white; strong-smelling herbs. 



