158 



Fig. 152. AIRA CARYOPHYLIiEA Linn. Sp. PI. 6G. 1753. SILVERY HAIR- 

 GRASS.— A slender, tufted, glabrous annual 1-4 dm. (4'-16') high, with short 

 leaves and .small-flowered, open panicles 2-10 cm. (l'-4'jlong. Sheaths mostly 

 basal ; ligule 3 mm. m") long ; leaf-blades 1-5 cm. (^'-2') long, involute-.seta- 

 ceous. Spikelets fa) 2-3 mm. (l"-li") long with equal acute empty glumes and 

 very acutely 2-toothed, awned flowering glumes (?)) ; awns 3-4 mm. (li"-2") 

 long.— In sandy waste places, Massachusetts to Virginia ; also on the Pacific 

 coast. Introduced from Europe. May to August. 



Of no agricultural value. 



