CLASS III. ORDER III. 23 



SciRPUs MARiTiMUS. L. Sea Club rusTi. 



Culm triangular, panicle clustered, leafy, terminal ; 

 glumes pointed, torn into three segments. 



Syn. SciRPUs macrostachyus. Lam. Mnhl. 

 SciRPUS ROBUSTUs. PursJi. 



Culm erect, smooth, one or two feet high, leafy at hase. 

 Leaves linear, acute, rough on the margin. Bractes or floral 

 leaves several, very unequal in length. Panicle resting on these, 

 crowded, consisting of large sessile and pedunculated spikes, 

 ovate, conspicuous by their dull, chesnut color and yellow an- 

 thers. The glumes are ovate, shining, slightly carinated, divided 

 into three small segments at tip, the middle one of which is pro- 

 longed into a short, setaceous awn. — Salt marshes and ditches. — 

 July. — Perennial. 



I do not discover sufficient grounds to separate this from the 

 European plant. 



SciRPus AcuTus. 3TuJd. Pointed BullrusTi. 



Culm round, leafless, equal ; spikes several, below 

 the top, oblong, somewhat umbelled. 



Syn. SciRFus valtdus. Pursh ? 



SciRPCJS LAcusTRis. Torrcy 1 



This nearly resembles the large huUrush, {Scirpus lacustris) 

 hut differs in its fructification, which is lateral, never terminal. 

 Culm sheathed at base, erect, round, smooth, naked, filled with 

 light, spongy pith, often spotted, five or six feet high, uniform 

 in size for a great part of its length, ending in an acute point. 

 Spikes several, in a cyme or umbel about an inch below the tip, 

 oblong and closely imbricate. Peduncles rough, coinpressed, 

 unequal ; scales ovate, mucronate, scarious at the edges, pubes- 

 cent. — In deep water at Fresh Pond and elsewhere. — June, 

 July. — Perennial. 



This is the largest rush in the vicinity. The name acuttis 

 was given it by Muhlenberg. 



'5>§§ Subgenus Trichophorum. Seed surrounded with bristles 

 much longer tfian itself. Style filiform, deciduous. 



