Class III. Order II. 25 



grass to appear on new grounds. Culms smooth, flattened, 

 spreading obliquely. Leaves flaccid, obtuse, their margin wav- 

 ed in the middle. Stipules sharp. Panicle erect, with its 

 branches depressed when old. 



29. BRIZA, 



BRIZA CANADENSIS. Mich. Rattlesnake grass? 



Panicle lax, spikelets erect, with from four to 

 ten florets ; calyx very small ; outer valve of the 

 corollas oval, acute. Mich. abr. in. t. 



A targe grass found in meadows and readily recognized by 

 its swelling spikelets. Stem erect, smooth. Leaves rough on 

 the back. Panicle loose, with slender branches, nodding. 

 Spikelets numerous, on distinct footstalks, ovate, erect or nod- 

 ding. Valves of the calyx short and narrow. Outer valve of 

 the corolla oval, inflated, acute, with a scarious point and mar- 

 gin. Inner valve obtuse. July. 



30. FESTUCA. 

 FESTUCA ELATIOR. L. Tall Fescue grass. 



Panicle drooping, spreading loosely every way, 

 much branched ; spikelets ovate-lanceolate, acute ; 

 florets cylindrical, obscurely ribbed. Sm. 



Stem three or four feet high, glabrous. Leaves wide and 

 long, smooth with a rough margin. Panicle large, decom- 

 pound, loose and nodding. Spikelets numerous, pedunculated, 

 ovate-oblong, acute. Glumes of the calyx unequal, acute, keel- 

 ed, glabrous. Florets numerous, two ranked, glabrous. 

 Meadows and thickets. June. Perennial. 



This is a very productive and useful grass. 



