34 GRAMINEAE (GRASS FAMILY) 



Culms one to three feet tall, erect, usually simple but sometimes 

 branched, growing in tufts. Sheaths smooth ; blades three to ten 

 inches long, one-fourth to one-half inch wide, rough on the margins, 

 dark green. Spikes two to four inches in length, rather thick, the 

 involucral bristles subtending the spikelets being nearly a half-inch 

 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 in 

 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 



Cenchrus tribulmdes, L. 



Other English names : Hedgehog Grass, 

 Bur Grass, Cockspur 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 



FIG. ll.-Sand-bur(CencAru to the P OOr beasts 

 tribidoides). x 1. they rankle. 



