CYPERACEJS. 433 



minate, compressed, crowded, bifid, 3-nerved, serrulate on the margin, 

 at length diverging, rather shorter than the ovate cuspidate glume. 



HAS. Wet meadows. N. Y. to Car. ; common. May. If.- 

 Culm 2 feet high, obtusely triangular. Spike subpaniculate. 



16. C. setacea Deic. : spike oblong, decompound, bracteate ; spike- 

 lets glomerate, ovate, obtuse ; fruit ovate, acuminate, compressed, bi- 

 fid, subdiverging, as long as the ovate-lanceolate awned glume. 



HAB. Wet meadows. Mass. Dew. June, July. 21. Culm 

 18 30 inches high, acutely triangular, sulcate. Resembles the 

 preceding, but its fruit is less ovate, longer and more com- 

 pressed. 



17. C. paniculate Linn. : spike decompound, paniculate, interrupt- 

 ed, the branches alternate and somewhat remote ; fruit ovate, acumi- 

 nate, spreading, margined above, bifid. 



HAB. Wet meadows. Mass. N. Y. N. J. May. U-Culm 

 18 inches high. Spikes not becoming black. 



18. C. teretiuscula Good. : spike decompound or paniculate, dense, 

 subacute, (often dioecious, at length brown) ; spikelets with short 

 bracts at the base ; fruit ovate, acuminate, somewhat gibbous at the 

 base, bidentate, ciliate- serrulate on the margin. 



HAB. Marshes and bogs. N. Y. and N. Eng. May. Culm 18 

 inches high. Spike narrow. Fruit and glume brown. 



2. With 3 stigmas. 



19. C. pcdunculata Muhl. : spikes about 4, on long peduncles, very 

 remote ; fruit obovate, triquetrous, obtuse, smooth, entire at the ori- 

 fice ; glumes ovate, mucronate, (purple and green.) 



HAB. Rocky hills. Can. to Penn. May. It. Culm filiform, 6 

 inches high. Peduncles mostly radical. Glumes purplish and 

 green. 



20. C. ovata Rudge. : spikes about 5, pedunculate, ovate, pendulous; 

 fruit obovate, acute at each end, as long as the ovate acute glume. 



HAB. Canada. If.. Culm acute, triangular. Spikes densely 

 imbricate. Glumes brown, as long as the fruit. 



b. Summit pist ittiferous. 

 1. With 2 stigmas. 



21. C. deweyana Schio. 4* Torr. : spikes about 3, sessile, loose, two 

 of them approximate, the third distant, with long bracts at the base, 

 (except the highest) ; fruit oblong-lanceolate, subcompressed, rostrate, 

 bifid at the point ; beak serrulate ; culm flaccid. 



HAB. Woods. N. Y. and N. Eng. June. It. Culm 14 feet 

 high, weak and slender, subprocumbent. Plant yellowish- 

 green. 



22. C. loliacea Linn. : spikes about 4, rather distant, few-flowered ; 

 fruit elliptical, obtuse, nerved, compressed, erect. 



HAB. Swamps. N. J. 1 N. to Arc. Amer. Culm 2 feet high, 

 glender. Spikes 3 5-flowered. 



37 



