WEEDS IN THE MEADOW. 



219 



Eritjenni aitiiuiiiii, Per.s., Ti. bellidifolium, 

 Muhl., E. FhiladeljjhicKm, L., U. strigosum, 

 Muhl., arc other species of similar liabit to fig- 

 ure 105, and are quite unsightly and common 

 in. thin meadows. 



Riiclbechia liirta, L. (Cone-flower.) This 



hairy weed has a purple cone surrounded with 



Canodeusc, L. (Flea- yellow ray-tlowers. It is becoming more coin- 

 bane.) lx2Q.— (Slid- ^ J & 



'*^"^*'^'' mon, and has made its Avay from the West to 



the New Hiiglaud' States. 



Fig. )0.). Hriyiron 



Fig. 106. Fig. lOT. Fig. 108. 



Fig. lO&.—AchilUva MiUefolium, L. An achene, two views. 1 y 10.— (Sudworth.) 

 Fig. 107— Lcucanthcmam vidoare. Lam. (Ox-eye.) Achtne enlarged.— (Scribner.) 

 FlO. 108.— C?UCMS arreiisis, (Canada thistle); an achene, also a cross section of the 

 same. IxlQ.- (Sudworth.) 



Leucanthem.il ill vulgare, Lam. (Ox-eye, White Daisy.) This is 

 one of the worst perennial weeds or weeds of any kind which 

 infests the nieailows and pastures of this country. The seeds- 

 are sown with grass seed. 



Cnicus arvensis, Hoffm. (Canada Thistle). This is often con- 

 sidered the arch fiend of Aveeds, and is too well known in many 

 localities. 'J'he heads are small and the scales of the involucre 

 scarcely prickly pointed. It is a perennial rooting very deeply. 

 Its course westward is likely to be checked by the fact that it has 

 usually failed to ])roduce seeds on the prairies. It is often dia>- 

 cious. Some account of this pest is given in connection with the 

 chapter on clover. 



