MANUAL OF THE GRASSES OF THE UNITED STATES 293 



2. Aira caryophyllea L. Silver hairgrass. (Fig. 581.) Culms 

 solitary or in small tufts, erect, 10 to 30 cm taU; panicle open, the 

 silvery shining spikelets 3 mm long, clustered toward the ends of the 



Figure 5SX.-Aira caryophyllea. Plant, X H; spikelet and floret, X 10. (Heller 3889, Wash.) 



spreading capillary branches; both lemmas with awns about 4 mm 



w g: A ° j t pe - n - diy F ound ' Coa stal Plain, Massachusetts to 

 *londa and Louisiana; Ohio; common on the Pacific coast from 

 .British Columbia to California (fig. 582); southern South America. 



