26 CLASS III. ORDER III, 



of the calyx very small; outer valve much larger, carinated, and 

 rough with minute prickles on the keel. — Marshes. — August. — 

 Perennial. 



Spartina juncea. Mulil. Short RougJi grass. 



Spikes from one to three ; peduncles smooth ; outer 

 valve of the calyx rough with minute teeth on the 

 back ; leaves convolute-setaceous. 

 Syn. Trachtnotia juncea. 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. 



Spartina glabra. MuJd. Ditch grass. 



Spikes ninnerous, sessile, somewhat imbricated ; 

 valves of the calyx mostly glabrous. 



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

 water ditches. Stem round, smooth, three or four feet high. 

 Leaves very long, smooth, acute. Spikes ten or a dozen, sessile, 

 lying over each other, with their backs successively applied to 

 the three sides of a long triangular, smooth, common stalk. 

 Flowers closely imbricated, in a double roW, leaning outAvard, as 

 in the former species. Inner valve of the calyx linear. Outer 

 valve many times larger, compressed, and to the naked eye gla- 

 brous. Through a glass it is found ciliated on the keel. An- 

 thers straw colored. — August, September. — Perennial. 



25. ORYZOPSIS. 

 Oryzopsis asperifolia. Mr. Mountain Rice. 



Leaves erect, rigid, pungent at the point; panicle 

 simple. 



This grass is remarkable for its large seeds, which, it has been 

 suggested, may render it worthy of cultivation. It is a foot or 



