VEGETATIVE ORGANS OF GRASSES 34 7 



Roots do not originate at evevy node. Roots are few, short and 

 Mbrous. Leaves rolled in the bud ; lignle membranous, short, en- 

 tire ; sheath oj^en, not compressed ; blade flat, sharp-pointed, one- 

 half cm. wide ; nerves inconspicuous, broad, pubescent just above 

 the ligTile, especially on either side of the mid-nerve. Collar 

 broad, narrow pubescent. Auricles present, slender, terminating 

 in a hairlike appendage. 



Fig. 122 — -Agropyron SmitMi. Western Wlheat Grass. A. ligule ; B, collar: 

 C, leaf rolled in bud ; D, new rhizome ; E, rhizome of previous year's growth. 



Agropyron SmitMi. Western Wheat Grass. Figures 122 and 

 123. 



An upright, glaucous, bluish green perennial. Several culms 

 in a cluster. Rhizomes creeping, slender, one to two mm. wide. 

 Nodes are one to two cm. apart. The old rhizome dies, and from 



