Class III. Order I. 17 



duncles rough ; outer valve of the caly* rough with 

 minute teeth on the back. 



Syn. DAcfn.rs crNosuRoiDES. L* 



Mich. 



Stem three feet high, round and smooth. Leaves very 

 long, smooth, somewhat rough on the margin, the edges convo- 

 lute when the plant grows near the sea. Spikes numerous, on 

 rough peduncles, given off successively from the three sides of 

 a triangular common stalk. Flowers closely imbricated, in a 

 double row, leaning to one side of their flexuous receptacle. In- 

 ner valve of the calyx very small ; outer valve much larger, 

 carinated, and rough with minute prickles on the keel. Marsh- 

 es. August. Perennial. 



SPARTINA JUNCEA. Muhl. Short rough grass. 



Spikes from one to three ; peduncles smooth ; 

 outer valve of the calyx rough with minute teeth on 

 the back ; leaves convolute-setaceous. 



Syn. TfiAcarNoriA yuircEA. Mich. 



A much smaller grass than the preceding, which it resem- 

 bles in the form of its spikes. Stem round, smooth, about a 

 foot high. Leaves alternate, somewhat two ranked, acquiring 

 when rolled up, a filiform appearance. Spikes about two, on 

 smooth stalks, shorter than in the foregoing species, but similar 

 in shape. Outer valve of the calyx nerved, rough on the keel 

 like the last. Anthers purplish. Salt marshes. July. Pe- 

 rennial. 



SPARTINA GLADUA. Muhl. Ditch grass. 



Spikes numerous, sessile, somewhat imbricat- 

 ed ; valves of the calyx mostly glabrous. 



ir 

 A large rank grass, common about muddy shores and in salt 



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