316 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



Figure 631.— A, Calamagrostis canadensis. Plant, X Hi glumes and floret, X 10. (Chase 5077, Mont.), 

 B, Var. scabra, X 10. (Pringle, N. H.) C, Var. macouniana, X 10. (Pammel 891, Minn.) 



