(96) 



4. H. CALIFORNICUS DC. Receptacle 

 convex; paleae of receptacle blunt, not aris- 

 tate; disc-flowers yellow, only their anthers 

 brown. U- Berkeley hills. San Eafael. Sum- 

 mer. 



b. Palece deciduous. 



29, PllgiopappUS Gray. 



Superflua. Head oo-flowered. Ray-flowers 

 broad, deeply crenate. Involucre 2-seriate. 

 Pappus of the disc 0; of the ray 2-aristate. 

 Flowers yellow. Leaves alternate. . 



1. P. CALLIOPSIDEUS Gray. Alma. Sum- 

 mer. 



30. Leptosyne DC. 



Superflua. Head oo-flowered. Ray-flowers 

 broad, deeply crenate. Involucre 2-seriate, 

 Pappus 0. Flowers yellow. 0. 



1. L. STILLMANI Gray. Alma. Summer. 



31, Bidens L. BEGGAR-TICKS. 



Frustranea. ^Equalis. Head oo-flowered. 

 Involucre 2-seriate. Pappus 2-4-aristate. 

 Leaves opposite. 



1. B. CHRYSANTHEMOIDES Michx. Flowers yel- 

 low. 0. Swamps near San Francisco (extinct) 

 Marin county. Summer. 



