332 CYI'ERACEJE. (SEDGE FAMILY.) 



Var. Deweyi, Bailey. Usually more slender than the last, the leaves 

 and sheaths smooth : pistillate spikes 1 to 2 inches long and £ inch or 

 less broad : perigynium very smooth, usually somewhat polished, rather 

 coriaceous, the nerves not conspicuous, the teeth mostly short: scale usually 

 not conspicuously awued. — C. Iceviconica, Dew. Big Sioux and Yellow- 

 stone Rivers ( //■■• Bismarck, North Dakota [A. B. Seymour). These 

 varieti* - as all gradations into the species, which may occur within our 

 eastern limits. 



§ 11. Sterile and fertile spikes one to several or many : fertile spikes mostly large 

 and compactly flowered : perigynium much inflated {cross- section nearly twice 

 or much more than twice the width of the mature achenium), membranaceous, 

 smooth, conspicuously nerved (or nearly nerveless in No. 35), tapering into a 

 toothed beak as long as the body or longer. — Physocarpj:, Drejer. Mostly 

 large and stout species, to be regarded as the most developed of the genus. 

 Xo. 35 is the leas: developed of the section, and in some forms it appears 

 to ally itself with other ar.d very dissimilar sections. 



* Staminate spike solitary, stalked : pistillate spikes sessile or nearly so, short and 



thick, at maturity green or greenish-tawny, usually turning dark<olored in dry- 

 ing : perigynium large, very turgid at the base, gradually lengthened into a long- 

 conical slenderly toothed beak which much exceeds the scale. — Lcpulinj:, 

 Tuckm. 



33. C. lupulina, Muhl. Tall and leafy (2 to 3 feet high) : fertile spikes 

 2 to 4, several to many-flowered, heavy, turgid-oblong or cylindrical, approxi- 

 mate or the lower remote and on more or less exserted stalks, becoming nearly 

 straw-colored at full maturity ; bracts wide, long and leaf-like, the lower 

 sheathing : perigynium upright. — Indian Territory and southward in wet 

 places. 



C. inttmescexs, Rudge, distinguished by its few-flowered and aggregated 

 sessile, greener spikes, sheathless bracts, and more spreading perigynia, has a 

 similar range as the last, but has not yet been found within our limits. It 

 also occurs in British America. 



* * Stajninate spikes commonly more than one: pistillute spikes usually long and 



densely cylindrical (short in Xo. 35 and occasionally in No. 38) : perigynium 

 smooth and shinirig, long-beaked, at maturity ijellow or straw-colored, or occa- 

 sionally partly reddish purple. — Yesicari.e, Tuckm. 



*- Staminate spike one: pistillate spikes comose, cylindrical and drooping or 

 spreading: bracts sheathless or nearly so: beaks long. 



34. C. hystricina, Muhl. Plant rather slender, pale, 12 to IS inches 

 high : spikes 2 to 4. narrow (f to 2 inches long and J inch and less wide), nod- 

 ding or the upper one nearly erect or spreading, decidedly comose in appear- 

 ance : perigynium 15-nerved, not prominently inflated, prolonged into a very 

 slender and setaceously toothed beak, the lobes of which are spreading: scales 

 awn-like, shorter than the perigynium. — C. Cooleyi and C. Thurberi, Dew. 

 Wet places, New Mexico and northeastward to Nebraska. Distinguished 

 from C. tentaculata, Muhl., which may occur within our southeastern bor- 

 der, by its smaller, more comose and more nodding spikes, and by its smaller 



