122 COMPOSITAE (COMPOSITE FAMILY) 



single large heads; leaves 

 nearly entire, the upper ob- 

 long or lanceolate, sessile ; 

 the lower spatulate ; disk 

 dark purple or brown. Dry 

 soil. June to September. 



COREOPSIS 



Herbs, generally with 

 opposite leaves, and many- 

 flowered heads with yel- 

 low or parti-colored rays. 

 Involucre double, each 

 series of about 8 bracts, 

 the outer leaf-like and 

 spreading, the inner 

 broader and appressed. 

 Receptacle flat. Achenes 

 flat, often winged, 2- 

 toothed or 2-awned. 



C. lanceolata, TICKSEED. 



Rudbeckia hirta, Black-eyed Susan. . . , 



Smooth or hairy, tufted, 



branched only at base ; leaves all entire ; lanceolate ; the lowest ob- 

 lanceolate or spatulate; achenes with broad, thin, spreading wings. 

 Rich soil. May to July. 



ACHILLEA 



Herbs, with small corymbose heads. 

 Heads many-flowered with a few rays. 

 Bracts of involucre imbricated, with 

 scarious margins. Achenes oblong, flat- 

 tened, margined; pappus none. 



A. Millefolium, YARROW. Stem simple or 

 forked above, woolly or nearly smooth ; stem 

 leaves numerous, smooth or somewhat 



. _ Coreopsis lanceolata, Tickseed. 



pubescent; cormybs very compound, flat- 

 topped; bracts of involucre pale; rays 5-10, white to crimson. Fields 

 and banks. 



