22 TRIAXDRIA MONOGYNIA 



/Vrs. being found much preferable. The tatter spocies crows plentifully aioiu 

 iide-wator marshes of the Delaware) but hag not yei a found m Cheife 



bounty. 



§ 5. iS'/y/j 3-cleft, not bulbous at base, deciduous. Bristles tortuous, Capillary 

 .scarcely hispid. Spikelets numerous, terminal, in cymes or panicles. r ulm 

 leafy. Trichophorum. Pers. 



11. S. atrovirexs, JlfuhL Cyme compound, proliferous ; spikcletx 

 densely conglomerated in heads of 10 to 20; glumes acute, distinctly 

 mucronate, dark green. Jiech, Hot. p. 426. Specim. Gray, Gram, 

 2. no. 137. 

 N. sylvaticus. Jfu\ Am. 1. p. 33, Pursh ? Am. 1. /;. 50. Not of 



mud. &c. 



Dark-Grkex Scirpus. 



Root perennial. Culm 2 to 4 feet high, leafy, nodose, triangular. Liv<>h<<'r< \, 

 I iaceous, usually of throe leaves, Longer than the cyme. Spikelets <••• >ld, in a 

 compound paniculate cyme, densely clustered in somewhat ovoid //w'.-.\« f8or 10 to 

 20, or more ; sometimes viviparous. Glumes ovate, acute, terminating in a distinct 

 point, dark green, finally becoming brownish. Sited white, smooth, plan >*convei) 

 keeled on the back, mucronate. Bristlss usually A or 5, about as long as the l 

 nearly straight, with a minute, retrorse pubescence. 



Jfab. Swamps, and wet meadows: frequent. /V.July. Fr. Aug. 



Obs. The hypogynous bristles are commpnly 4 in number, viz. 1 opposite the 



middle of the flat surface of the seed, I at each side, and one at the keel ; but th 

 is frequently apairof them at the keel,— making 5 in all. This appears to be dis- 

 tinct from the S. sylvaticus, of Europe,— jud: in- from an indifferent specimen in 

 my possession. 



12. S. BnrxxKus, Jlfuhl. Cyme decompound ; spikelets clustered in 

 heads of 3 to 6 or 8 ; glumes obtuse, submucionate, reddish brown 

 heck, Hot. p. 426. 



8. exaltatus. Pursh, Am. I. p. 56. Ell Sic. I. p. 87. .Vait. Gen. 1 

 />. 32. 



Brown Scirpus. 



Root perennial. Culm '2 to 3 feet high, n idoee, obtusely triangular, clothed wid, 

 loosely sheathing, broadish leaves nearly as tall as the cyme. Involucre 4 or ft 

 leaved- Principal branches of the Cyme about :>, unequal, with toots, truncal* 

 sheaths at base. Spikelets ovoid, rather larger than in the preceding specie*. 

 rommonly in clusters of 3 to 6,— sometimes mere. Olumss o\air, healed, raihaj 

 obtuse, but slightly mucronate, at first yellowish preen, finally radish brown 

 .SV^/smooth, yellowish white, trifuetr.ais or stron::ly km -led : beak very short 

 Bristles 4 or o, nearly twice as long as the seed, tortuous, minutely hispid > 

 very fine retrorse teeth. 



flab. Wet places : Brandy wine : E. Xantmeal : not common. Fl. July. Pr. Ai. •. 

 Obs. Found by D. Tow xst-nd, Csq, i-». This spec lea, tho ugh not so common 

 boars a considerable resemblance to the preceding, and may be mistaken for it bv 

 young Botanists. 1 have noted the distinctive characters as can full v as I could 

 9f*and Ml'olt notice a viviparous variety of this species, which I have not 

 seen. I have, however, observed a var. of the S. atroxirens, with long, o void-lane* 

 ojatc spikelets, which was completely viviparous. 





