244 



WEEDS OF THE FARM AND GARDEN 



bracts ; achenes obtusely four-angled. Very common on 

 the Pacific coast and in fields and waste places on the 

 Atlantic coast occasionally as far west as Minnesota. 

 The garden chamomile (A. nobilis) is a pleasantly 

 scented, much-branched perennial ; bracts of involucre 

 obtuse with broad, rough margins; rays twelve to eight- 

 een ; achenes two to three-toothed, oblong and three- 

 angled. In eastern Atlantic states and on the Pacific coast. 

 Ox-eye Daisy (Chrysanthemum Leucanthemum, L.). 

 A perennial herb, with an erect stem ; spatulate, petioled 

 leaves, those of the stem partly clasp- 

 ing; all leaves cut or pinnatifid-toothed ; 

 the nearly simple stem bearing a large, 

 many-flowered head which has numer- 

 ous white rays; involucre with dry, 

 membranous margins; both disk and 

 ray-flowers produce achenes ; so-called 

 seeds marked with longitudinal lines ; 

 pappus absent. A troublesome weed in 

 eastern states but only occasionally an- 

 noying in the West. This is the ox-eye 

 daisy of American botanists, but accord- 

 ing to Fernald is not the European plant. 

 The common form is var. pinnatifidum. 

 Tansy (Tanacetum vulgar e, L.). A 

 eye 1 daisy 5 , 4 so-calle X d bitter, acrid, strong-scented, simple or 

 (Chrysanthemum branched perennial herb from two to 

 Leucanthemum). A f f t hj h i eaves pjnnately divided 

 most troublesome b .' .-,,... 



weed in eastern into linear pmnatifid divisions, lobes 

 meadows. (Ada serrate; heads corymbose, many flow- 

 ered; ray-flowers few, disk-flowers yel- 

 low; marginal flowers fertile, scales of involucre imbri- 

 cated in several series ; receptacle flat or convex, naked ; 

 branches of style brushlike at the summit; achenes five- 

 angled or five-ribbed, truncate or obtuse; pappus none 

 or a short crown. Native to Europe, frequently escaped 



