NUMBER AND KINDS OF WEEDS ON DIFFERENT SOILS 665 



Fig. 518. Green Foxtail (Setaria viridis). Common in gardens and fields. 

 (Photographed by Colburn.) 



Grass Land. — Buttercups, self-heal, docks, ragwort, daisy, thistles, 

 ribwort, plantain, creeping soft grass, common bent grass, York- 

 shire fog or woolly soft grass, moss. 



There are, however, many other weeds which are given by him 

 which are serious pests to the agriculturist of that country. Of the 

 weeds of the arable land he lists buttercups, poppies, fumitory, 

 charlock (Brassica arvensis),runch. (Raphanus raphanistrum) , shep- 

 herd's purse, corn cockle, spurrey, silver weed, cleavers, thistle 

 (Canada thistle), sow thistle, coltsfoot, groundsel, bindweeds (Poly- 

 gonum convolvulus), (Convolvulus arvensis), dodder, buckhorn, 

 plantain, broom rape, corn or field mint, hemp and dead nettle, 

 smartweed, or red-shank (Plygonum persicaria) , knotweed, docks, 

 goosefoot, quack grass, fine bent grass, pearl grass (Arrenatherum 

 avenaceum), slender foxtail (Alopecurus agrestis) , wild oats and 



