122 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 146.— Poa wolfii. Panicle, X 1; floret, X 10. (Deam 33821, Ind.) 



36. Poa bulbosa L. Bulbous blue- 

 grass. (Fig. 150.) Culms densely 

 tufted, more or less bulbous at base, 

 30 to 60 cm. tall; blades flat or 

 loosely involute, 1 to 2 mm. wide; 

 panicle ovoid, mostly 5 to 8 cm. 

 long, somewhat contracted, the 

 branches ascending or appressed, 

 some floriferous to base; spikelets 

 mostly proliferous, the florets con- 

 verted into bulblets with a dark 

 purple base (about 2 mm. long), the 

 bracts extending into slender green 

 tips 5 to 15 mm. long; unaltered 



spikelets about 5-flowered, apparent- 

 \y not perfecting seed; lemmas 2.5 

 mm. long, webbed at base, densely 

 silky on the keel and marginal nerves, 

 the intermediate nerves faint. 21 

 — Fields and meadows, New York to 

 North Carolina; North Dakota to 

 British Columbia and California; 

 Utah ; Colorado and Oklahoma ; intro- 

 duced from Europe, propagated by 

 bulblets. 



37. Poa nemoralis L. Wood blue- 

 grass. (Fig. 151.) Culms tufted, 30 

 to 70 cm. tall; ligule very short; 



