SOME COLORADO GRASSES. 63 
AGROPYRUM VIOLACEUM (Beauv.). 
Culms 2 to 5 feet high, densely tufted, geniculate 
below, fibrous rooted; leaves flat, glaucous or green, scab¬ 
rous, especially on the upper surface; spike 2 to 6 inches 
long, rigid; spikelets three to five-flowered, purplish; 
outer glumes strongly five-nerved, equal, both short, 
pointed and rough; flowering glume short awned, 
obscurely five-nerved, two of the latter extending into 
short teeth; palet equal, truncate or two-toothed. 
There are two forms of this species, differing chiefly 
in the color of the leaves and stems. Both are valuable 
hay grasses, enduring more moisture than Agropyrum 
glaucum. 
ANALYSIS. 
Moisture_ 8.30 
Ash ,_ 5.74 
Fat_ 2.24 
Albuminoid nitrogen_ 7.10 
Crude fiber_ 21.14 
Nitrogen-free extract_ 63.78 
Total_100.00 
AGROPYRUM UNILATERALE. 
Culms erect, smooth, 3 to 4 feet high; leaves ample, 
very scabrous ; ligule truncate, very short; panicle slen¬ 
der, spicate, secund, nodding; spikelets three to four- 
flowered ; rhachis hairy; outer glumes linear, four to six- 
nerved, tipped with a rough awn 4 inch long; nerves 
scabrous; flowering glume finely scabrous, flattened and 
obscurely nerved below; apex rougher, acutely tw r o- 
toothed, the mid-nerve terminating in a rough, straight 
