32. 



ways. Slender wheat grass (Agropyron tenerum) has slender 

 spikes from 4 to 8 inches long; the numerous rootstocks are ab- 

 sent. Quack grass is frequently mistaken for drop seed grass 

 (Muhlenbergia mexicana) but this may be readily distinguished 

 from quack grass by its clustered thick and short rootstocks and 

 for this reason sometimes it is called the turkey foot grass. The 

 spikes containing the seed are slender. The empty glumes are 

 nearly equal. 



Crab grasses. Left hand figure common Crab grass (PANICUM SANGUINALE) ; right 

 hand figure Smooth Crab grass (PANICUM GLABRUM). 



SQUIRRELTAIL GRASS (Hordeum jubatum L.) 

 An annual or winter annual from six inches to two feet high 

 producing fibrous roots. It forms solid and compact bunches. 

 Leaves not unlike those of blue grass, but paler in color, from 

 two to four inches in length, margins scabrous. Flowers in a 

 dense spike from two to four inches long, pale green or purplish 

 in color. The spike consists of a number of one-flowered spike- 



