284 Monograph of North American Varices. 



many obligations to my friends Professor Dewey of Williams 

 College, E. Davis, Esq. of Westfield, Mass., and Dr. J. Bar- 

 vatt of Middletown, Conn., for numerous specimens of northern 

 Carices, as well as for many valuable notes and observations. 



John Torrey. 



West-Point Military Academy, May 28th, 1825. 



Genus CAREX Lin. Sedge. 



Carex Lin.gen.pl. 1046. Schreb.gen.pl. 1407. Gaert. i.p. 12. 

 Lam. ill. gen. t. 752. Juss. gen. p. 26. Vent. fam. pi. ii. 

 p. 91. Nutt. gen. ii.p. 203. Nat. Ord. Calamaros Lin. 

 Cyperacje (Cyperoidse olim) Juss. R. Brown, Agardli._, 

 fyc. In sys. sex. monoecia triandria. 



Ch. Gen. Flowers glumaceous, generally monoicous, 

 (never perfect,) disposed in one or more imbricated aments. 

 Stam. fl. in the same spike with the pistilliferous, or in a 

 separate spike. Glumes one-valved, one-flowered, (the in- 

 ferior ones often empty,) lanceolate, concave, permanent. 

 Corolla 0. Stamens 3, hypogynous ; filaments capillary, 

 longer than the glume ; anthers erect, long-linear, cleft at the 

 base, entire at the apex. Pistil, fl. Glumes as in the 

 staminiferous. Corolla (nectarium Lin. ; capsule Vers, &fc. ; 

 nux coriacea Gcert. ; urceole Lam. ; arillus Gooden. Smith. 

 perianthium jR. Brown. ; glumella Rich. ; glum, infer. Turpin. 

 Jlgardh,) one glumed (formed of 2-3 coalesced valves . ? ) 

 urceolate, surrounding and concealing the germen, opening 

 at the summit by an entire or bidentate orifice, permanent. 

 Pistil : germen superior, triangular or compressed, enclosed 

 in the ventricose corolla ; style simple, persistent ; stigmas 

 2-3, exserted, subulate-linear, simple, incurved, pubescent. 

 Caryopsis (nux Vers. &c. ; achenium R. Br.) crustaceous, 

 triquetrous (when there are three stigmas,) or subtriangular- 

 compressed (when there arc two stigmas,) Embryo enclosed 

 at the base of the albumen. 



