COMPOSITAE 631 



i. A. Ptarmica L. In moist soil: Newf. to Que., Mass. and Mich. 

 Naturalized from Europe. 



Common as a garden escape and adventive plant in parts of 

 our range. 



2. A. lanulosa Nutt. Plains and mountains: S. Dak. to B. Col., 



south to Mex. and Kan. Adventive eastward. 

 Recorded as adventive in Conn. 



3. A. Millefolium L. In various situations: throughout the U. S. 



Adventive from Europe. 



Common everywhere as a weed. 



Achillea ligitstica All. has been collected as a waif near Tannersville, New York, 

 probably not persistent. 



40. Anthemis L 



Rays neutral; plant glabrous or nearly so, fetid. I. A. Cotula. 

 Rays pistillate; plants pubescent. 



Annual; chaff of the receptacle acute. 2. A. arvensis. 



Perennial; chaff of the receptacle obtuse. 3. A. nobihs. 



1. A. Cotula L. In fields and waste places: throughout temper- 



ate North America. Native of Europe. 

 Locally abundant as a weed ; often wanting. 



2. A. arvensis L. In fields and waste places: N. S. to Va., 



west to Mich., Mo. and on the Pacific Coast. Native of 

 Europe. 

 Common as an occasional weed. 



3. A. nobilis L. Escaped from gardens: R. I. to Del. and Mich. 



Adventive from Europe. 

 Rare as a weed near the larger cities, perhaps not persistent. 

 Anthemis tinctoria L. and A. mixta L. have been collected as waifs. 



41. Chrysanthemum [Tourn.] L. 



Heads large, few or solitary at the ends of the stem or branches; 



leaves merely incised. I. C. Leticanthcmum. 



Heads numerous, small, corymbose; plant escaped from gardens; 



leaves pinnatifid. 2. C. Parlhenium. 



I. C. Leucanthemum L. In waste places and fields: throughout 

 temperate N. Am. Native of Europe. 



Common as a field and roadside weed throughout the range, 

 except the pine-barrens, where occasional. 



