406 CYPERACEiE. 



19. C. sparganoides Muhl. : spikelets 6 — 10, ovoid ; the upper approxi- 

 mate ; lower somewhat distant, bracteate ; perigynium ovate, compressed, 

 acute, diverging, rough on the narrowly winged margin, about twice as 

 long as the ovate mucronate scale. 



Swampy grounds. N. Y. and Mass. to Car. W. to Ohio. May. 71. — Culm 

 2 feet or more high, rough on the angles above. Leaves broad-linear, pale- 

 green. Bur-reed Sedge. 



20. C. vulpinoidea Mich. : spike oblong, decompound, more or less inter- 

 rupted, bracteate ; spikelets glomerate, ovoid, obtuse ; perigynium com- 

 pressed, ovate, acuminate, bifid, 3-nerved, diverging, rather shorter than the 

 ovate cuspidate scale. C. rmdtijiora Muhl. 



Low grounds. N. Eng. and N. Y. to Car. ; common. May, June. %. — 

 Culm li — 'Z feet high, obtusely triangular above, leafy. Spike consisting of 

 8 — 10 clusters of spikelets. Fox Sedge. 



21. C. setacea Dew.: spike oblong, decompound, bracteate; spikelets 

 glomerate, ovoid, obtuse ; perigynium ovate-lanceolate, acuminate, com- 

 pressed, bifid, somewhat diverging, as long as the ovate-lanceolate awned 

 scale. 



Wet meadows. Mass. and N. Y. to Del. June, July. %.. — Culm about 2 

 feet high, acutely triangular, striate, rough above Resembles the preceding, 

 but it has a more compact spike, and the perigynia are narrower and more 

 compressed. Setaceous Sedge. 



22. C. bromoides Schlc. : spikes 4 — 6, alternate, oblong, erect, uppermost ^ 

 one fertile above, the rest pistilliferous or androgynous, with starainate and 

 fertile flowers both above and below ; perigynium erect, lanceolate, acumi- 

 nate, scabrous, nerved, longer than the lanceolate scale. 



Swampy grounds. Mass. N. Y. and Penn. to Ohio ; common. May, %. — 

 Culm 12—18 inches high, slender, rough above. Scales light brown. 



Brome-like Sedge. 



23. C.alopecoidea Tuckerman: spike compound, oblong; spikelets 8 — 10. 

 ovoid, aggregated, staminate above ; perigynium ovate, plano-convex, 

 nearly nerveless, about as long as the ovate mucronate scale ; the beak 

 acuminate, serrulate-scabrous on the margin. (^Torr. N. Y. Fl.) C. 

 cephalophora var, maxima Dew. 



Woods. Penn-Yan, N, Y, %-. — Culm 2—4 feet high, rough on the angles. 

 Spike yellovt'ish-green. Fox-tail Sedge. 



24. C, Sartwellii Dew. : spike compound ; spikelets 12 — 20, ovoid, ses- 

 sile, compact, bracteate ; lower ones fertUe ; upper often staminate ; peri- 

 gynium ovate-lanceolate, convex-concave, subulate, somewhat 2-toothed, 

 about as long as the ovate acute scale, 



Junius, Seneca County, N. Y. Dr. Sartwell. %. — Culm IJ — 2 feet high, 

 somewhat rigid, rough on the angles, leafy below. Leaves flat, linear, shorter 

 than the culm. Closely allied to C. disticha of Europe. 



SartwelVs Sedge. 



25. C. teretiuscula Good. : spike decompound, oblong, dense, at length 

 brown ; spikelets ovoid, acute, sessile ; perigynium ovate, acuminate, convex 

 and gibbous, ciliate-serrulate on the margin, longer than the ovate acute scale. 



Marshes and bogs. N. Eng. and N. Y. May. %.-—Cuhn 2 feet or more 

 high, rough on the angles, leafy below. Scales brownish. 



SmaUer-panicled Sedge. 



