ORDEK 154. CYPERACEvE. 373 



V C. gynocrates Wormesk. 9 Spike oblong, rather loose-flowered; perigynium 

 obloiig, short-beaked, longer than the ovate, acute, colored ghime. N. Y., Mich. 



3 <!. exklis Dew. Spk. cylindrical, 1', dense, g below, or wholly f or 8 ; perig. Ber 



rnlate on the margin, some longer than the ovate-lanceolate glume. Culm and leave? 

 filiform, stiffly erect, 1220'. Ms. to N. Y. and N. J. 

 |3. androg-yna. One or more small 9 spikes below the terminal. N. Y. 



4 C. sclrpoidea MX. Spk. oblong-cylindric (912") ; perig. oval, pubescent, longei 



than t .ho ovate dark-purple glume. Leaves flat. 4 10'. N. H. to Mich. 



5 C. poljtriclioides Muhl. Spk. oblong, small (3"); perig. 38, erect, smooth 



twice longer than the ovate obtuse glume. Setaceous, 420'. Ms. to Wis. 



6 C. panclflora Ltf. Spk. with about 4 slender reflexed 8 fls. and 1 or 2 t above 



twice longer than the lanceolate glume. Erect, 38'. N. England, New York. 



7 C. Boottiaiia Benth. Culm 612' ; spk. oblong-cylindric, dioecious ; perig. hairy, 



obovate, smaller than the dark-purple glume. Ala. to La. 



8 C. Willdenovll Schk. Peduncles radical, filiform, 26' ; spk. small, Sgls. above, 



4 8, 9 perig. 5 9, scabrous, pointed, the glumes oftener long and bract-like, Leaves 

 1 2f, grassy. Dry grounds : common. 



9 C. Stendellt K. Peduncle radical, 18' ; spk. with 1015 i glumes above and 3 



or 3 inflated pointed perigynia with long leaty glumes. N. Y., Pa., and W. 



10 C. IS i<-kii Boott. Ped. radical, i3f, stiff ; t fls. about 3, above. 9 perig. 8-4, 

 glabrous, round-ovate, enclosed in the long leafy glumes. N. Y., O., and N. 



11 C. F riser! Sims. Culm 410', Ivs. 612' by 1', flat and thick; spk. oblong, 

 00 -flowered, perig. ovoid, longer than the hyaliue, obtuse glume. Wytheville, Va. 



(flhriver) and Mts. of N. C. A curious and peculiar Cares. Leaves very large. 



I- 



12 C. stcrilis Willd. Culm (and Ivs.) slender, erect, 1 2f; oftener dhecious; spks. 

 36, roundish, approximate, $ spikes oblong; perig. radiating, ovate, subrostrate, 

 2-toothed, about equaling the ovate acutish glume. Common in wet places. 



13 C. bromoides Schk. blender, weak, 1 2f; spikes 46, distinct, lanceolate; 

 perig. lanceolate, erect, acuminate, longer than the lanceolate gls. Bog* : common. 



14 C. siccata Dew. Erect, 1 2f ; spks. 37, oval to oblong, t above, or the middle 

 all t ; perig. lance-ovate, beaked, as long as the brownish gls. Sands, N. Eng. to 111. 



15 C. dictlclia llnds. (C. Sartwellii Dew.) Erect, 2 3f; spks. 1220, the lower 

 some remote, all ovoid and compact, stain, mostly above ; perig. ovate, lanceolate, 

 pointed, equaling the ovate pointed glume. Seneca Co., N. Y. (Sarlwelt), and W. 



16 C. decoraposita Muhl. Culm erect, 18 36'; spikes very many, in a large 

 crowded panicle ; perig. round-obovate with a very short beak, biconvex, about 

 equaling t^ie ovate glume. N. Y. to Mich., and S. 



17 C. prairea Dew. Culm 2 3f; spikes many, in a dense short (3 4') panicle; 

 perig. erect, lance-ovate, smaller than the glume. N. Eng., and W. 



18 C. teretliiscula. Good. Spikelets roundish, dense, in a cylindrical compound 

 spike 1 2' ; perig. brown, corky, ovate, biconvex, short- beaked, diverging ; culm 

 H 3f; leaves narrowly linear. Common in wet places, northward. 



10 C. vnlpliioidea MX. Spikelets very many, dense, ovoid, in a large (2 3') com- 

 pound spike ; perig yellowish, very small (J"), ovate, acuminate, diverging, scarcely 

 as long as the pointed glume ; culms- P tout, 2 3f. Common. 



/3. net arm. Perig. narrower, erect, in a more slender compound spike. 



y. uttibrtor (Sartivell). Spikes distinct or remote, glume strongly serrulate 



20 C. coujuiicta Boott. Spikeluts in a long (3') subsiniple spike; perig. ovate, 

 eubcordate and corky at base, short-beaked ; style bulbous at base ; nut orbicular ; 

 culm weak, 1 2f, flattened. Ohio, and westward. (C. vulpina C-B.) 



21 C. alopeeoidea Tuckm. Spikelets 812, in an oblong 1 >' spike ; perig. ovate 

 nerveless, brown, 1". snbrostrate ; culm 3-angled, 2 3f. N. Y., Pa., and W. 



22 C. stiputa Muhl. Spike often decompound, 2 3', spikelets CD, oblong; 



