74 
SOME COLORADO GRASSES. 
SPOROBOLUS AIROIDES (Torr). 
Culm stout, smooth, thickened at the base, from 
stout, creeping root-stocks; leaves linear, soon involute, 
long pointed, rough on the margins; sheaths smooth, 
shorter than the nodes; ligule a fringe of hairs; panicle 
pyramidal, soon exserted, diffuse, 1 foot long; rays mostly 
solitary, smooth, much branched and few flowered above 
the middle, naked below; spikelets purplish, one-flowered ; 
outer glumes unequal, acute, the upper and larger obs¬ 
curely three-nervedflowering glume oblong, keeled, 
acute; palet nearly equal, obscurely two-toothed. 
This grass occurs in alkaline soils on the plains and 
in the mountain parks. It is abundant in North Park, 
Pass plains, and near Laramie City. Its is a pasture 
grass, the culms being too light and naked to make it 
valuable for hay. It grows in densely sodded, leafy 
patches, from underground stems. Stock of all kinds 
like it. 
ANALYSIS. 
Moisture_r_ 7.92 
Ash_,_ 8.98 
Fat_ 2.25 
Albuminoid nitrogen_ 7.32 
Crude fiber_14.80 
Nitrogen-free extract_66.65 
Total_100.00 
