CYPERACE^. (sedge FAMILY.) 597 



hairy. (C. atherbdes, Sprenfj. C. mirlita, Dnr.) — Lake sliorcs and rivrr-banks, 

 N. New York to JMicliigaii, and iiortliwestward. — Culm 2° - 0° liiyli : leans 

 2" -3" wide. Fertile spikes 2'-o' long, often loosely flowered towards the base. 

 (En. C. orth(jstacliys.) 



125. C. trichoeai'pa, ]\[iihl. More .slender; le.aves and bracts rongh, 

 but not hairy; fertile spikes 2 or .3, fewer-flowered; pcrigynia more ovate and 

 with shorter and stouter teeth, do\vny-j)ul)escent, the scale short-awned or awn- 

 less. (C. striata, Ed. 1, not of Michx.) — lii water or wet ground: eonunon, 

 especially northward. 



Var. imberbis. Perigynia glabrous ; sheaths rather rough. Penn-Yan, 

 New York, Sartwell. Illinois, Me(td, E. Hall, and northwestward. 

 •I- -t- Staminate spikes solitary, loith a filiform bract ; fertile 3-5, cylindrical, densely- 

 flowered, on lontj exserted and at len<)t/i drooping stalks, mostly approximate : 

 perigynia widely spreading, reflexed at maturity. 



126. C. COmbsa, Boott. Fertile spikes thick (l'-3' long, and 6" -7" 

 wide), the lowest sometimes very remote; perigynia tapering from a stalked ovoid- 

 triangular base into a long deeply 2 forked beak, the sharp elongated teeth widely spread- 

 ing or somewhat recurved ; scales lancetjlate, with a long bristle-shaped awn 

 shorter than the mature fruit ; culm rough and triquetrous. (C. furcata, ^//., 

 not of Lapeyr. C. Pseudo-Cyperus, Schw. ij' Torr., Dew., Sfc, in part, not of Z^.) 



— Wet places : common. — A robust species 2° - 3° high, formerly confounded 

 with the next, which it greatly resembles ; but it differs especially in the larger 

 fertile spikes, longer beak of the fruit, and the longer, smooth and widely 

 spreading teeth, giving to the spikes a comose or bristly appearance. 



127. C, Pseudo-Cyp6rus, L. Fertile spikes narrower and sometimes 

 slightly compound at the i)ase ; perigijnia as in the last, but with a shorter beak 

 and shorter less spreading teeth ; scale about the length of the mature fruit. — Bor- 

 der of lakes and in bogs. New England to Pennsylvania, and northward. (Eu.) 

 § 12. Perigynia much inflated, conspicuously many-nerved, smooth, ivith a long tajyer- 



ing 2-toothed beak : bracts leaf-like, much exceeding the culm : scales tawny 

 or white : staminate spike stalked, always solitary. — Lupulin.e. 

 * Bracts with very short or obsolete sheaths. 



128. C. hystrieina, Willd. Sterile spike often bearing a few fertile flow- 

 ers at the base or apex; fertile sjnkes 2-4, oblong-cylindrical, densely flowered, 

 the u])permost on a very short stalk, the others on long stalks and at length nod- 

 ding, the lowest often very remote ; perigynia spreading, tapering from an ovoid 

 base into a long slender /^-a/i; with sharp smooth teeth, longer than the awncd scale. 



— A variety with shorter ovoid spikes, the lowest very remote on a filiform stitlk, 

 4' -6' long, with rather smaller perigynia not much longer than the awn, is 

 C. Cooleyi, Diw. — Wet meadows : common. — Plant pale or yellowish green, 

 with fertile spikes 9'' to 1^'long. Distinguished from the preceding by the 

 more inflated less diverging fruit, its beak longer and teeth shorter ; and from 

 the following by the smaller nodding spikes and many-nerved periginium, 

 with longer and smooth teeth. 



129. C. tentaeulkta, Muhl. Fertile spikes 2-3, ovoid, oblong, or cylindri- 

 cal, densely flowered, approximate and diverging horizontally, the uppermost ses- 



