326 Monograph of North. American Car ices. 



Culm 12 — 18 inches high, triangular, leafy. Leaves about as long as the 

 culm, smooth or slightly pubescent, 2 lines broad, the exterior sheaths 

 purple at the base. Spikes 4, oblong, supported by filiform peduncles 

 an inch or more in length ; terminal one androgynous, the inferior two 

 thirds sterile and slender. Glumes ovate, acute, mucronate, green 

 with a white margin, about half as long as the fruit. Fruit distinctly 

 triquetrous, acute, a little tapering at the base, smooth, obscurely 

 nerved, yellowish when mature, orifice minute, entire or slightly bidea- 

 tate. 



Hab. In wet upland meadows. Stockbridge, Massachu- 

 setts, he. Prof. Dewey. 



Obs. Colour of the whole plant yellowish green. This spe- 

 cies is allied to C digitalis, but differs in its acute fruit, 

 shorter and ovate spikes, &ic. 



53. Carex Davisii.* 



C. spicis quaternis, filiformibus, pedunculatis, subcernuis, 

 suprema inferne sterili ; fructibus oblongis, triquetris, 

 utrinque acutis, subbilobis, gluma oblonga aristata brevi- 

 oribus ; foliis vaginisque pubescentibus. 



C. aristata, Dewey 1. c. vii. p. 277. h ix. t. 1. f. i. 



C. (anon.) No- 45. Mulil. gram. p. 254. 



Culm about a foot and a half high, leafy. Leaves longer than the culm, 

 slightly pubescent ; sheaths pubescent. Spikes 4, filiform, with the rachis 

 flexuous, on filiform peduncles, which are only slightly sheathed at the 

 base, varying from an inch to an inch and a half in length ; florets 

 rather loosely imbricate. Glumes of the sterile florets lanceolate, 

 hyaline, with a green keel: of the fertile oblong-lanceolate, hyaline, 

 acuminate and terminating in an awn which projects beyond the fruit ; 

 keel green. Fruit smooth, with a membranaceous orifice which is 

 obscurely 2-lobed. 



Hab. William stown, Massachusetts. Prof. Dewey. hi New- 

 Jersey and Cherokee. Muhlenberg. 



Obs. The specimens in Muhlenberg's herbarium, labelled 

 No. 373, were examined by Dr. Torrey, and found to be 

 precisely the same with the C. aristata of Prof. Dewey 



