HOW TO KNOW THE GRASSES 



29a. Panicle open, pyramidal, with spreading or drooping elongated 

 branches. Fig. 214. 



BLUEJOINT Calamagrostis canadensis (Michx.) Beauv. 



Perennial; culms slender, in small tufts, 60 

 — 150 cm. tall; plants producing many, long, 

 creeping rhizomes. The panicles vary from 

 rather dense to loose, pyramidal, and nod- 

 ding. Bluejoint is a very widespread and 

 common species found in marshes and wet 

 ground. While rather tough, it furnishes a 

 good deal of forage and is sometimes cut for 

 marsh hay in the North Central States. June 

 — August. 



Figure 214 



29b. Panicle dense, cylindrical, with short, erect branches. Fig. 215. 



Calamagrostis inexpansa Gray 



Perennial; culms in tufts, 40—120 cm. tall- 

 plants producing rhizomes. The dense, cylin- 

 drical panicle may be pale or purplish. The 

 leaf blades are rough to the touch and usually 

 rolled; hgules 4 — 7 mm. long. Marshes and 

 wet meadows, apparently sometimes on dry soil 

 in the western mountains. June — July. 



Figure 215 

 30a. Glumes unequal, the first shorter than the floret, the second longer 



w 1 



30b. Glumes equal, both longer than the floret; palea shorter than the 

 lemma; tufted or rhizome-bearing plants 32 



31a. Lemma without long hairs on the callus; glabrous or with ap- 

 pressed hairs on the back *^ 



114 



