CYPERACE^E. (SEDGE FAMILY.) 593 



to Ga. ; rare eastward. In var. mspf DULA, Gray, the perigyuium is sparsely 

 hispid ulous. 



7. C. lupulina, Muhl. Very stout and leafy; leaves rather broad and 

 loose ; pistillate spikes 2-6, approximate at the top of the culm, all closely 

 sessile or the lower sometimes short-peduncled, oblong or short-cylindrical, 

 very heavy and densely flowered ; stamiuate spike small and sessile ; peri- 

 gyuium large and rather soft, erect or but slightly spreading, giving the spike 

 a hop-like aspect (whence the name). (C. lurida, Bailey.) Swamps and wet 

 pastures; frequent. 



Var. pedunculata, Dewey. Spikes more or less scattered, some or all 

 prominently peduncled ; staminate spike usually conspicuous, often long- 

 peduucled, very variable in size ; perigyuium more spreading. (C. gigautea, 

 Rudye.) With the species, but more common. 



Var. polystachya, Schwein. & Torr. Stouter, the leaves very broad 

 (often |') ; bracts broad and far exceeding the culm ; pistillate spikes 4-6, 

 all long (3-4') and cylindrical, more or less short-peduncled, somewhat scat- 

 tered, becoming yellow ; perigyuium very large, ascending. (C. lupuliformis, 

 Sartw.) N. Y. and N. J. ; not common. 



C. LUPULINA X EETROESA, Dudley. Distinguished from C. lupulina by its 

 straw-colored perigynium, which is less inflated and more spreading, standing 

 at nearly right angles to the axis of the spike ; scales acute to short-awned, 

 rough. (C. lurida X retrorsa, Bailey). Ithaca, N. Y. (Dudley), and Lansing, 

 Mich. (Ballet/). Resembles u. 16. 



8. C. grandis, Bailey. Distinguished from C. lupulina, var. polystachya, 

 by its much more scattered and mostly shorter slim spikes, which are com- 

 paratively loosely flowered ; perigyuium swollen below but very abruptly con- 

 tracted into a slender beak 3-4 times as long as the body, spreading at right 

 angles or nearly so, never becoming yellow; scales narrow, smooth. (C. gi- 

 gautea of previous editions.) Swamps, Ky., Del., and southward ; local. 



* 1. -i- 3. Vesicarice. 

 M- Spikes very small, globular or short-oblong. 



9. C. oligosperma, Michx. Very slender, but stiff, 18-30' high; 

 leaves and bracts very narrow, becoming involute; staminate spike single, 

 peduucled ; pistillate spikes 1 or 2, sessile or the lowest very short-peduucled, 

 3 - 8-flowered ; perigyuium turgid, short-ovoid, gradually contracted into a 

 very short and minutely toothed beak, promineutly.few-nerved, yellow, nearly 

 twice longer than the blunt scale. Deep swamps and borders of lakes, N. 

 Eng. to Peun. and Minn. ; frequent. 



10. C. miliariSj Michx. Culm very slender but erect, 12-18' high, 

 smooth, or slightly rough above on the angles ; leaves almost filiform, mostly 

 shorter than the culm; staminate spikes 1-2, exceedingly narrow, elevated 

 an inch or two; pistillate spikes 1-3, the upper one sessile and the lowest 

 very short-stalked, 9" long or less, the lower subtended by a short leafy bract ; 

 perigynium very small, broad- or round-ovate or ovate-oblong, thin but firm, 

 bearing a nerve on each side but otherwise nerveless or very nearly so, rounded 

 into a very short terete entire or somewhat erose beak ; scales brown, lance- 

 ovate, white tipped, about as long as the perigynium. (C. rotundata ? of last 

 e( j.) Outlet of Moosehead Lake, Maine, and northward. 



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