WILD FLOWERS OF NEW YORK 317 



lished in meadows and fields throughout the east. Flowering from June 

 to August. In meadows and hay fields it is frequently an obnoxious weed. 



The Common White Daisy (Chrysanthemum leucanthe- 

 mum Linnaeus), perhaps even more abundant in meadows and fields, 

 with its bright yellow center and white ray flowers, needs no description 

 or illustration for its identification. Native of Europe and introduced 

 very early into America and now thoroughly established in the north- 

 eastern states. 



Tall or Green-headed Coneflower 



Ritdbeckia laciniata Linnaeus 



Plate 255 



Stems tall, leafy and much branched, sometimes 10 or 12 feet tall, 

 from a perennial root. Leaves thin in texture, minutely hairy above and 

 on the margins, both basal and upper leaves pinnately divided and toothed, 

 the lower into three to seven segments and long petioled, the upper leaves 

 into three to five lobes and short petioled or sessile. Heads 3 to 4 inches 

 broad. Ray flowers yellow, six to ten in number, surrounding the columnar, 

 dull greenish-yellow disk which becomes oblong-shaped in fruit and two 

 or more times as long as thick. 



Moist thickets and low woods, especially along streams, Quebec to 

 Manitoba and Idaho, south to Florida, Colorado and Arizona. Flowering 

 from July to September. 



This plant is the origin of the Golden Glow, a common garden variety 

 in which the disk flowers are all transformed into ray flowers. 



Narrow-leaved or Swamp Sunflower 



Helianthus angustifolius Linnaeus 



Plate 2493 



Easily distinguished from the other Sunflowers by its narrow, linear 

 leaves and yellow heads with purplish disks. Perennial by slender root- 

 stocks; stem rough, 2 to 7 feet high; slender and branched above, usually 

 somewhat hairy below. Leaves firm and tough, slightly rough, linear, 

 entire and sessile, 2 to 7 inches long, one-sixth to one-third of an inch wide, 



