42 



GRASSES AND FORAGE PLANTS. 



Fig. 30. Sea Spear Grass. 



Fig. 32. Common Manna Grass. 



The Floating Meadow Grass, or Common Manna Grass, 

 (^poa Jluitans,} referred by Gray to glpceria, differs from the 

 other species of the poa genus in the general appearance of its 

 slender panicle and long, linear spikelets. It grows from fifteen 

 inches to two feet high, with a perennial, creeping root, erect, 

 round, smooth stem, leaves large, rather long, roughish on both 

 sides, lower ones flat, upper ones generally folded ; spikelets 

 few, long and linear, as shown in Fig. 32, which represents the 



