CYPERACE^E. 435 



30. C. festucacea Schk. : spikes obovate, (58,) subapproximate, 

 bracteate ; fruit roundish-ovate, rostrate, bidentate, winged, serrulate 

 on the margin, longer than the ovate-lanceolate glume. 



HAB. Meadows and woods. Throughout the U. S. May. 24!. 

 Culm 30 inches high, sometimes decumbent. Fruit silvery 

 white or pale green, not becoming tawny. 



31. C. stellulata Good. : spikes 3 4, rather remote, upper one at- 

 tenuate at the base, the rest ovate ; fruit ovate, plano-convex, spread- 

 ing, and at length reflexed, short-acuminate, scabrous on the margin. 



HAB. Wet grounds. N. Y. to Car. May. UCulm 8-18 

 inches high, slender. Fruit broad ovate, almost cordate when 

 ripe. 



32. C. scirpoides Schk. : spikes 4, ovate, obtuse, approximate, upper- 

 most one clavate ; fruit ovate, bidentate, plano-convex, erect, and a 

 little spreading, but not reflexed, subcordate, serrulate, longer than the 

 ovate obtuse glume. 



HAB. Wet meadows. N. Y. to Car. May. 2f Culm 6 1ST 

 inches high, stiffly erect. Fruit erect or spreading horizontally. 



33. C. curta Good. . spikes about 6, subremote, somewhat cylindric- 

 ovate, tumid, sessile ; fruit short-ovate, plano-convex, rather acute, 

 erect, entire at the point. 



HAB. Wet meadows. Can. and N. Y. May. It. Culm 2 feet 

 high, nodding at the top. Glumes whitish, with a green keel. 



34. C. tcncra Dew. : spikes about 5, obovate, rather remote, sessile 

 attenuate at the base, the lowest bracteate ; fruit ovate, compressed, 

 rostrate, serrulate, longer than the oblong-lanceolate glume. 



HAB. Moist meadows. Mass. N. Y. May. If. Culm 15 30 

 inches high. Spikes nodding, brownish. Resembles C. scopa- 

 ria, but differs in the form of the fruit. Dr. Torrey queries 

 whether it is not C. sterilis. 



35. C. rcmota Linn. : spikes alternate, remote ; bracts leafy, very 

 long ; fruit ovate acuminate, bifid, somewhat compressed. 



HAB. Woods. Tenn. 1 Torr. N. to Arc. Amer. 



2. With 3 stigmas. 



36. C..atrata Lfinn. : androgynous spikes 3, pedunculate, crowded, 

 subpendulous in fruit, (black ;) fruit roundish-ovate, with a short beak, 

 bidentate. 



HAB. White Hills. N. H. Nutt. Rocky Mountains. James. 

 June. H. Culm 6 inches high. Spikes large, black. 



c. Summits of the highest and loicest spikelets staminiferous Hie middle 

 spikes entirely staminiferous. 



1. With 2 stigmas. 



37. C. siccata Dew. : terminal spikes obtuse ; lower ones mostly in 

 fours, ovate, somewhat acute ; fruit ovate-lanceolate, acuminate, com- 

 pressed, scabrous on the margin, bifid, nerved, nearly equal to the 

 ovate-lanceolate scale. 



