24 Class III. Order III. 



ERIOPHORUM VIBGINICUM. ,. Virginian cotton grass. 



Culms roundish below, three sided above ; spikes 

 nearly sessile, clustered, erect ; involucre two or 

 three leaved. 



Leaves very long. Wool of a reddish colour, short. Wet 

 meadows and swamps. July. Perennial. 



21. SPARTINA. 



SPARTINA CYNOSUROIDES. Mufti. Rough grass. 



Spikes numerous, alternate, or scattered ; pedun- 

 cles rough ; outer valve of the calyx rough with 

 minute teeth on the back. 



Syn. DACTTLIS CTNOSUROIDES. L. 



TRACHTNOTIA CTNOSUROIDES. Mich. 



Stem three feet high, round and smooth. Leaves very long, 

 smooth, somewhat rough on the margin, the edges convolute 

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

 peduncles, given off successively from the three sides of a trian- 

 gular common stalk. Flowers closely imbricated, in a double 

 row, leaning to one side of their flexuous receptacle. Inner 

 valve of the calyx very small ; outer valve much larger, cari- 

 nated, and rough with minute prickles on the keel. Marshes. 

 August. Perennial. 



SPARTINA JUNCE A. Muhl. Short Rough grass. 



Spikes from one to three ; peduncles smooth ; out- 

 er valve of the calyx rough with minute teeth on the 

 back ; leaves convolute-setaceous. 



Syn. TRACHTNOTIA JUKCBA. Mich. 



A much smaller grass than the preceding, which it resembles 

 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. Perennial. 



