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3. Potentilla L. Five-finger. 



Calyx concave or flattened, 5-lobed, aug- 

 mented by 5 bractlets. Petals 5. Stamens a 

 multiple of 5. Ovaries oo, on a slightly coni- 

 cal receptacle. Styles lateral. Fruit oo akenes. 

 Receptacle not enlarged. 



1. P. GLANDULOSA Lindl. Flowers cymose; 

 petals pale yellow, sometimes white. — U- 

 Contra Costa range. Summer. 



2. P. ANSERINA L. Flowers axillary, soli- 

 tary, yellow. — U' Common on moist places. 

 Summer. 



4. Horkelia Cbam. & Schlecht. 



Calyx campanulate, limb 5-parted, augment- 

 ed by 5 bractlets. Petals 5. Stamens a multi- 

 of 5. Ovaries inserted on a conical receptacle; 

 styles subterminal. Fruit akenes. — U- 



1. H. Califoenica Cham. & Schlecht. Glan- 

 dular pubescent; calyx-tube deeply campanu- 

 late; petals white. — Common. Summer. 



2. H. Kelloggii Greene. Silky pubescent; 

 calyx-tube spreading; cupuliform; petals white. 

 Alameda. Summer. 



Family 4. SANGUISORBACE^. 



Calyx-tube contr-icted at its apex, including 

 the ovaries. Petals often 0, Stamens and 

 ovaries often reduced in number. Ovaries 1- 

 ovulate. 



llA 



