24 VASCULAR PLANTS. 



8. Solidago, L. 



Superflua. Head oo-flowered; ray flowers 

 ligulate, few, distant from each other. Akenes 

 terete, co-costate; pappus of go, capillary 

 bristles. 



U - autumnal, suffrute scent plants, with long 

 rod-like branches; flowers yellow. 



c. Ray flowers never yellow. 



9. Aster, L. (Nees). 



Superflua. Head co-flowered; ray flowers 

 1-seriate, ligulate. Scales of the involucre 

 imbricate. Style appendages triangular-lanceo- 

 late to subulate. Pappus of copious, capillary, 

 scabrous bristles. 



IX . flowers rose color, white, blue. 



10. Corethrogyne, D. c - 



Frustranea. Head co flowered; ray flowers 

 oo , 1-seriate. Scales of the involucre imbricate. 

 Style appendages of disk flowers with tuft-like 

 bristles. Pappus of simple, unequal, rigid biis- 

 tles. 



U . flowers blue, purple ; habit of Aster. 



11. Erigeron, L- 



Superflua. Necessaria. Head co-flowered ; 

 ray flowers co-seriate, ligulate. Scales of the 

 involucre imbricate, linear. Pappus scanty, of 

 scabrous, capillary bristles. 



11 . flowers blue, white ; habit of Aster. 



