G3 



THICKSPIKE WHEATGRASS 



Agropy'ron dasystach'yum, syns. A. dasystach' yum subvillo' sum, A. lanceola'- 

 tum, A. subvillo' sum, A. yukonen'se 



Flower heads (spikes) terminal, erect, up to 

 7 in. long, the individual flower groups (spike- 

 lets) rather distant to crowded 



Spikelets up to 8-flowered, rounded or slightly 

 flattened, placed flatwise at the angles of the 

 slightly zigzag flower-head axis (rachis), up to 

 % in. long 



Outer flower bract (lemma) hairy or only 

 harsh, pointed at tip or short-bristle-pointed 

 (awned), about % in. long 



Lowest (2) spikelet bracts (glumes) lanco- 

 shaped, sharp or awn-pointed, smooth to 

 slightly hairy; 1st glume narrow, about # in. 

 long, 3- to 5-veined; 2d glume broader, longer, 

 5- to 7-veined 



Leaves narrow (K in. wide), 2 to 10 in. long, 

 sometimes flat but mostly inrolling, harsh 



Stalks (culms) up to 40 in. high, smooth, 

 slender to stout 



Rootstocks underground, long-creeping 



Roots fibrous 



