North. American CyperacecR. 423 



143. C. TRicHOCARPA, Muhl. I hi Willd. s]}. 4. p. 302 ; 

 Schkuhr, car. f. 148. 



Hab. Briiish America ! to Georgia ! 



144. C. LACUSTRis, Willd. sp. 4. p. 306 ; Schkuhr., car. 

 f. 182. 



C. riparia, Muhl. ! gram. p. 259. 



Hab. Canada to South Carolina ! — Distinguished from 

 C. riparia by its strongly nerved fruit with a more acutely bifid 

 mouth. 



145. Carex MiCRODONTUS, Torr. fy Hook. 



Staminate spikes 3 ; fertile spikes about 4, exsertly pedun- 

 culate, erect, cylindrical, attenuate and more or less stami- 

 niferous at the summit ; fruit ovate, compressed, obscurely 

 striate, acute, with a minutely bidentate orifice, scarcely ex- 

 ceeding the broadly ovate, acuminate, somewhat cuspidate 

 scale. 



Culm "2 feet high, slender. Leaves 2 — 3 lines wide. Fertile spikes 

 an inch and a half long, about 3 lines in diameter, gradually attenuate 

 into a point ; peduncles as long as the spikes. Fruit 2 lines long, acute 

 but scarcely acuminate, the orifice almost entire. Scales of the stami- 

 nate spike ovate, acuminate. 



Hab. Texas, T. Drummond ! (Texas collection, HI. no. 

 439.) 



Obs. This species seems to be allied to C. paludosa, but 

 is much smaller in all its parts ; its fruit is very distinct. 



146. C. BiNERVis, Smith, Evg. hot. t. 1099 ; Hook. Eng. 

 Jlora, p. 396 ; Dewey! car. I. c. 30. p. 61. 



Hab. Boston, B. D. Greene, Esq. ! — Agrees very nearly 

 with the European plant. Introduced.'* 

 Vol. m. 54 



