187 



Fig. 483. Agrostis alba Linn. Sp. PI. 63. Herd's Grass or 

 Rkd-top. — A well known perennial of variable habit, often stolo- 

 niferous, with smooth culms 3 to 9 dm. high, flat leaves, and erect, 

 many-flowered, open panicles 4 to 18 cm. long. Spikelets 2 to 

 3 mm. long, with abruptly acute empty glumes (a), which are a 

 little longer than the obtuse or truncate flowering glume. Palea 

 one-half to three-fourths as long as the glume.— Throughout the 

 United States, excepting in the extreme South. [Europe.] June- 

 September. 



