WILD FLOWERS OF NEW YORK 30! 



Involucre ovoid, campanulate or turbinate; its bracts mostly obtuse 

 or rounded; basal leaves few and small, or commonly none 

 (except A. glomeratus) 

 Leaves membranous or thin, smooth or nearly so 



Heads short-peduncled, three-fourths of an inch broad or less, 

 the disk turning crimson; leaves acute or short-acuminate 



2 A. carmesinus 



Heads long-peduncled, three-fourths of an inch broad or more, 



the disk turning brown or reddish ; leaves long-acuminate 



Heads i inch broad or more; leaves of the branches large, 



long, lanceolate, acuminate 3 A. tenebrosus 



Heads three-fourths to i inch broad ; leaves of the branches 



small, obtuse or acute 4 A. divaricatus 



Leaves thick, firm, rough; heads one-third to one-half of an inch 



high ; inflorescence paniculate or glomerate 

 Leaves acute or short-acuminate, pilose beneath; inflorescence 



glomerate 5 A. glomeratus 



Leaves long-acuminate; not pilose beneath; inflorescence open- 

 paniculate 6A.claytoni 



Involucre cylindric; its bracts tapering to an obtuse apex; basal leaves 



large, tufted 

 Bracts of the involucre pale, scarious, usually without herbaceous 



tips 7 A. curvescens 



Bracts of the involucre broader, with herbaceous tips 



8 A. schreberi 

 Rays violet, usually three-toothed; plants glandular 



Predominant glands large, capitate; leaves thick, coarse, heavy 



Sinus broad; glands chiefly confined to the inflorescence; plant 



usually harsh 9 A. macrophyllus 



Sinus narrow; glands abundant on the leaves and stem; growing 



plant clammy 10 A. roscidus 



Predominant glands minute, scarcely capitate; leaves usually thin 



Inflorescence very irregular, paniculate-corymbose ; plants often 4 to 

 5 feet high ; broader leaves large, cordate, acute ..n A.nobilis 

 Inflorescence rather regular, flat, or convex-topped; plants usually 

 less than 2\ feet tall 



