(96 ) 
4. H. Catirornicus DC. Receptacle 
convex; pales of receptacle blunt, not aris- 
tate; disc-flowers yellow, only their anthers 
brown.—2f¢. Berkeley hills. San Rafael. Sum- 
mer. 
b. Palece deciduous. 
29. Pugiopappus Gray. 
Superfiua. Head o-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. catLiopsipeus Gray.—Alma. Sum- 
mer. 
30. Leptosyne DC. 
Superflua. Head o-flowered. Ray-flowers 
broad, deeply crenate. Involucre 2-seriate, 
Pappus 0. Flowers yellow.—©. 
1. L. Stitmant Gray.—Alma. Summer. 
31. Bidens L. Brcear-Ticxs. 
Frusiranea. MAiqualis. Head o-flowered. 
Involucre 2-seriate. Pappus 2-4-aristate. 
Leaves opposite. 
1. B. curysanTHEMoIDES Michx. Flowers yel- 
low.—©. Swamps near San Francisco (extinct) 
Marin county. Summer. 
