(86) 



10. Aster (Nees.) 



Superflua. Head oc-flowered. Eay -flowers 

 1-seriate, ligulate. Scales of involucre imbri- 

 cate. Style appendages triangular-lanceolate 

 to subulate. Pappus of copious capillary, scab- 

 rous bristles. — 21 . Ray-flowers rose-color, 

 white, blue. 



1. A. RADULINUS Gray. Pappus rigid; some 

 of the bristles thickened toward the top; rays 

 white. — IC. Berkeley. Autumn. 



2. A. Chamissonis Gray. Pappus soft; stem 

 glabrous, erect and branching, leafy; involucre 

 imbricate, its scales with green tips; ray -flow- 

 ers violet. — U- San Francisco at the ceme- 

 tery. Autumn. 



3. A. divaricatus Nutt. Pappus soft; stem 

 glabrous, diffusely branched; branches slender; 

 involucre imbricate, its scales with scarious 

 margins. — 0. Salt marshes, San Francisco. 

 Autumn. 



11. Erigeron L. Flea-bane. 



Superflua. Necessaria. Head c»-seriate, lig- 

 ulate ; scales of the involucre imbricate, linear. 

 Pappus scanty of scabrous, capillary bristles. 



1. E. STENOPHYLLUS Nutt. Stem leafy; leaves 

 linear, scabrous, deep green; rays purple. — U- 

 Livermore. Autumn. 



