GRAMINEAE (GRASS FAMILY) 33 



tribution of seed from tardily grown plants. Sheep may be turned 

 in to graze down the aftermath of infested meadows. 



BRISTLY FOXTAIL 



Setaria verticillata, Beauv. 



Introduced. Annual. Propagates by seeds. 



Time of bloom : July to September. 



Seed-time: August to October. 



Range: Nova Scotia to Ontario, and eastern part of United States 



to New Jersey and Kentucky. 

 Habitat : Fields, gardens, and waste places. 



Growing in tufts from fibrous roots like the preceding species, 

 but lower and more spreading, the culms 

 ten inches to two feet tall, usually de- 

 cumbent at base, more or less branched. 

 Leaves two to eight inches long, from a 

 quarter-inch to a half-inch wide, rough 

 on the upper surface. Spikes two to 

 four inches long, the involucral bristles 

 at the base of the one-seeded spikelets 

 being in pairs, stout, and downwardly 

 barbed, standing out almost at right 

 angles to the spike. These downward 

 barbs cause the seeds to adhere to the 

 wool of sheep, which the seeds of other 

 Foxtails do not do. 



Like the preceding species, this weed 

 is controlled by preventing seed pro- 

 duction. 



GREEN FOXTAIL 

 Setaria viridis, Beauv. 



Other English name: Bottle Grass. 



Introduced. Annual. Propagates by 

 seeds. 



Time of bloom : July to September. 



Seed-time: August to October. 



Range : Throughout North America ex- 

 cept the far North. FIG. 10. Green Foxtail 



Habitat: All soils; invades all crops. (Setaria viridis). X J. 



