34 GRAMINEAE (GRASS FAMILY) 
Culms one to three feet tall, erect, usually simple but sometime 
branched, growing in tufts. Sheaths smooth; blades three to te1 
inches long, one-fourth to one-half inch wide, rough on the margins 
dark green. Spikes two to four inches in length, rather thick, th« 
involucral bristles subtending the spikelets being nearly a half-incl 
long, two to six for each flower, green or sometimes yellowish 
barbed upward. Seed similar to that of Yellow Foxtail but slightly 
smaller, very common in clover seed. Also it seems a worse pest ir 
lawns and gardens than either of its relatives. (Fig. 10.) 
Means of control 
Hoe-cutting or hand-pulling while 
the tufts are small, in lawns and gar. 
dens; surface cultivation or burning 
over of stubbles after harvest; pre 
vention of seeding in all ways possible. 
SAND-—BUR 
Cénchrus tribuloides, L. 
Other English names: Hedgehog Grass, 
Bur Grass, Coekspur Bur, Sandspur, 
Bear Grass. 
Native. Annual. Propagates by seeds. 
Time of bloom: June to August. 
Seed-time: July to September. 
_ Range: Maine and Ontario to the 
Dakotas, southward to Florida, 
Texas, and Southern California ; 
most troublesome in the South. 
Habitat: Sandy soil; shores and waste 
places. 
Usually this grass may be found 
growing near any place where wool 
has been stored and cleaned. The 
burs are said to be more difficult to 
remove from the fleeces than any 
others, and a tribulation they must be 
Fie. 11.—Sand-bur (Cenchrus tO the poor beasts in whose hides 
tribuloides). X }. they rankle. 
