GRASSES OF IOWA. 



265 



DESCRIPTION. 



Kentucky Blue Grass, June Grass. An erect perennial, i to 

 3 feel (2-J-7 dm.) high, with smooth stems, Hat leaves, open panicle 

 and extensively creeping rootstocks. Sheaths smooth, ligule about \ line 

 (i mm.) long; leaf-blade, 4 to 10 inches (8-20 cm.) long, | to 3 lines 



Pro. 185. Pou pratensis-a, spikelet; b, flowering Fig. 186. Poa arachnifera— a, empty glumes; b, 



glume. (Div. Agro9. U. S. Dept. Agrl) flowering glume9; (Div. Agros. U. 8. Dept. Agrl.) 



(l-6 mm.) wide, apex abruptly pointed. Panicle pyramidal, 3 to 7 

 inches (G-14 cm.) long, the primary branches usually in threes or fives. 

 Spikelets about 2 lines (4 mm.) long, three to five-flowered, mostly on 

 very short, scabrous pedicels; empty glumes a little unequal, the first 

 narrowry-lanceolate and usually one-nerved, the second broader and 



