GRAMINEiE 183 



Spica-Ventiy Beauv); flowering glume with a long awn, 

 panicle large (3 in.), spreading; cultivated land. A. in- 

 terruptay L., similar, but panicle narrow, interrupted ; 

 cultivated land. 



14. Calamagrostis, Adans. 



Rachis of spikelet with long silky hairs; spikelets in 

 a close panicle with whorled branches, I -flowered; stem 

 tall, leafy. 



A. Flowering glumes hyaline: — C. EpigejoSy Roth; 

 panicle open, awn of flowering glume inserted above the 

 middle; wet places. C. lanceolata^ Roth; panicle open, 

 awn terminal; swamps. C. teyiella^ Host.; stem 18-24 

 in., slender, hairs of rachis few; dry; alpine. C. Hal- 

 lerianay DC; stem 2-3 J ft., rachis very hairy; alpine 

 meadows. C. litoreay DC. ; panicle rather drooping, stem 

 usually very rough ; river-banks, local. 



B. Flowering glumes not hyaline, or only at the edge, 

 awn of flowering glume twisted (Deyeuxia, Clar.) : — C. 

 variuy Lk. (jnontana, DC.) ; awn bent, hairs of rachis very 

 long; bushy; alpine. C. arundinaceay Roth {sylvaticay 

 DC); hairs of rachis not so long, awn bent; bushy; 

 alpine. C. neglecta, Fr. ; awn straight ; peat-bogs, very 

 rare; Pontarlier, Constance. 



15. Lasiagrostis, Lk. 



Resembling Calamagrostis y but only the empty glumes 

 enveloped in long silky hairs. 



L. Calamagrostis, Lk. ; panicle spreading, white, shin- 

 ing, awn of empty glume very long ; rocky ; alpine. 



