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 
Setdria 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. 
ger na Annual. Propagates by 
see 
Time of bloom: July to September. 
Seed-time: August to October. 
Range: Throughout North America ex- 
cept the far North. 
Habitat: All soils; invades all crops. 
D 
Fig. 
10. — Green Foxtail 
(Setarta viridis). xX i. 
