34 Class III. Order III. 



cous, narrow, with long sheaths. Panicle erect, crowded, tend- 

 ing- to one side, obtuse ; its branches short and rough, appressed 

 to the stem except at the time of flowering. Spikelets ovate. 

 Florets closely imbricate, varying in number, connected at base 

 by a thin web. Dry grounds. July, August. Perennial. 



POA ANNUA. it. Annual Fpear grass, 



Panicle divaricated ; spikelets ovate ; florets a lit- 

 tle remote, five ribbed, destitute of a web ; stem ob- 

 lique, compressed. Sm. 



A smaller grass but equally common with the first. It is 

 annual in duration, but rapid in increase, and commonly the first 

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

 spreading obliquely. Leaves flaccid, obtuse, their margin waved 

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

 depi-essed when old. 



POA NERVATA. Willd. Meadoiv Spear grass. 



Panicle diffuse, weak, nodding, spikelets five flow- 

 ered ; florets seven nerved, obtuse. 



A tall slender meadow grass, the panicle commonly nodding, 

 the spikelets small and purplish. Wet grounds. July. Pe- 

 rennial. 



POA AQUATICA. /s. Tor. Water Spear grass. 



Panicle erect, diffuse, its branches flexuous, smooth ; 

 spikelets linear, six to eight flowered ; florets ovate, 

 obtuse ; leaves broad linear, smooth. 



A tall rank reedy grass, four or five feet high, with a panicle 

 nearly a foot long. Wet soils. August. 



POA MARITIMA. Sea Spear grass. 



Panicle branched, somewhat crowded ; spikelets 

 cylindrical, about five flowered, leaves involute, root 

 creeping. 



About a foot high, rigid and glaucous. Panicle erect, spike- 

 lets linear, nerved. When in flower this grass has a beautiful 



