M2 MONOECIA.— TRIANDRIA. 



HAB. Wet sandy soil. June. Culm 2 ft. high ; 

 glum, brown ; Jr. bidentate. 

 48. C. pubescens: sterile spike subsessile ; fertile 3, 

 oblong, erect, rather loosely-flowered, ihe lowest 

 on a short peduncle ; fruit ovate triquetrous, 

 rostrate, pubescent, orifice nearly entire, as long 

 as the ovate mucronate glume ; leaves and culm 

 pubescent. 



HAB. Woods. May. Culm 12 — 18 in. high, erect 

 or subdecum. ; leav. pale gr. 

 19. CJlava: sterile spike on a short peduncle ; fer- 

 tile mostly 8, ovate, subapproximate, (the lowest 

 rather remote,) on short included peduncles ; 

 fruit ovate, densely imbricate, bidentate, with a 

 curved and reflexed rostrum, shorter than the 

 ovate-lanceolate glume. 



HAB. Highland meailows. Culm 12 — 14 in. high, 

 (sometimes 3 — 1 ;) plant yellowish. 

 50. C. (Ederi : sterile spike on a short peduncle ; fer- 

 tile about 3, ovate, approximate, subpedunculate, 

 densely flowered ; fruit ovate-globose, horizontal, 

 with a straight rostrum. 



HAB. Wet rocks and banks. June. Culm 6—12 

 in. high ; spik. andfr. small, yell. 



61. C. tentaculata: fertile spikes 2—3, (rarely 4,) 

 sessile, ovate or ovate-cylindrical, approximate, 

 horizontal ; bracts very long ; fruit ovate, ven- 

 tricose, nerved, with a very long rostrum, orifice 

 bidentate, longer than the lanceolate glume. 



HAB. Wet meadows. May— June. Culm 12— 18 

 in. high; spik. very large, thick. 



62. C. nigra : sterile spike pedunculate ; fertile 2 — 3, 



(rarely 4,) rather remote, oblong (black,) sessile, 

 erect ; fruit obovate, compressed-triquetrous, 

 subacute, orifice entire, as long as the ovate glume. 

 HAB. High mountains. July. Cidm 8—12 in. 

 high] Jr. smooth, nerveless; styles 2 — 3. 



63. C. lupulina : sterile spike on a short peduncle, 

 (rarely geminate ;) fertile 3, subsessile, ovate-ob- 

 long, erect, approximate ; bracts very long and 

 leafy ; fruit ovate, inflexed, nerved, long-rostrate, 

 bicu9pidate,much longer than the ovate glume. 



