732 



WEED FLORA OF IOWA 



Fig. 553. Foxtail Grass (Alopecurus geniculatus) , 



mopolitan grass. 

 (U. S. Dept. of Agr.) 



Widely distributed. Cos- 



Asia, Africa, Australia, North and South America; pigeon grass 

 (Setaria glauca), in Europe, Asia, Africa, North and South Amer- 

 ica; whorled millet (Setaria verticillata) , in Europe, Asia, Africa, 

 North and South America; Johnson grass (Sorghum halepense), 

 in Europe, Asia, Australia and North America; foxtail grass 

 (Alopecurus geniculatus) , in Asia, New Zealand, Australia, North 

 America; hair grass (Agrostis hyemalis), in Australia, New 

 Zealand, North America; Bermuda grass (Cynodon dactylon), a 

 valuable forage plant, but, in cultivated fields, a weed, Europe, 

 Asia, Africa, Australia, New Zealand, North and South America; 

 southern spear grass (Eragrostis pilosa), Europe, Asia, Africa, 

 Australia, New Zealand, North and South America ; crowfoot grass 



