MANUAL OF THE GRASSES OF THE UNITED STATES 339 



weak and lax to relatively stout and tall, 30 to 100 cm tall; leaves 

 rather numerous, the blades lax or stiffly upright, corresponding to the 



Figure 687.— Agrostis idahoensis. Panicle, X 1; glumes and floret, X 5. (Chase 5162, Idaho.) 



culms, 1 to 6 mm wide, 10 to 20 cm long; panicle pale, open, oblong, 

 the branches ascending, branching again 

 about the middle; spikelets 2 to 3 mm long; 



glumes nearly equal, 



acute or acuminate ; 



lemma 1.5 to 2 mm 



long, awnless (rarely 



awned) ; palea obso- 

 lete or nearly so. % 



— Open ground, old 



fields, open woods, 



in rather dry soil 

 from sea level to the tops of the mountains, figure m.-Agrostis baked. Pan 

 flowering in late summer or autumn, Quebec *<*>> x /= g ' umes and floret - x 5 - 



-» i • i -m -i l (Dupi. type. j 



to Minnesota, south to r londa and eastern 



Texas (fig. 691). In dry open ground the culms are erect and rather 



>-*F 



Figure 688.— Distribution of 

 Agrostis idahoensis. 



Figure 690.— Agrostis perennans. Panicle, X 1; glumes and floret, X 5. (Millspaugh 53, W.Va.) 



stout; in shady places the plants are lax and the panicle lax with 

 divaricate branchlets. 



