CYPERACEAE (SEDGE FAMILY) 



249 



523. C. oligosperma. 



than the perigynia. In sandy soils, from s. Me. to e. N. Y., and D. C. ; "south 

 to Ga." May-July. FIG. 521. Var. KENNEDYI Fernald. Staminate spike 

 about I cm. long, hidden by the pistillate. Wilmington, 

 Mass. {Kennedy}. 



155. C. stria ta Michx., var. brdvis Bailey. Stiff, 3-8 

 dm. high, extensively creeping ; culm sharply angled, smooth 

 or slightly rough above, mostly exceeding the leaves ; leaves 

 narrow and stiff, becoming involute; spikes 1-2, mostly 

 closely sessile, considerably separated when two, short 

 (1-5 cm. long} and rather thick, erect ; perigynia broad- 

 ovoid with impressed nerves, smooth, ascending, short- 

 beaked and very short-toothed ; scales thin, obtuse or 

 acutish, mostly about \ as long as 

 the perigynia. ( C. Walteriana, var. 

 Bailey.) Pine-barren swamps, s. e. 

 Mass., south w., local. June-Aug. 

 FIG. 522. 



156. C. oligospSrma Michx. 

 Very slender, but stiff, 2.5-9 dm. 

 high ; culms solitary or few from a 

 slender stoloniferous base; leaves 

 and bracts very narrow, becoming 

 involute; Staminate spike pedun- 

 cled ; pistillate spikes 1 or 2, rarely 

 3, sessile or the lowest very short- 

 peduncled, globular or short-oblong 

 (0.7-2 cm. long} few-flowered ; peri- 522> c striat brev 

 gyma turgid, shining, gradually 

 contracted into a very short and minutely toothed beak, 

 prominently few-nerved, yellowish, nearly twice longer 

 than the blunt scales. Bogs and wet shores, Lab and Nfd. to the 

 Mackenzie, s. to Pa., and the Great Lake region. June-Aug. 

 FIG. 523. 



157. C. IIIRTA L. Variable in size (2-6 dm. high), widely creep- 

 ing ; culm rather slender but erect, obtuse and smooth or slightly 

 rough above ; leaves soft and flat, generally sparsely hairy and 

 the sheaths very hirsute, rarely smooth ; spikes 2-3, distant, more 

 or less shortly peduncled, erect or nearly so, 

 1.5-4 cm. long, rather loose; perigynia long- 

 ovoid, nerved, soft-hairy, the prominent beak 

 slender-toothed ; scales thin and green-nerved, 

 awned, mostly a little shorter. Groves, fields, 

 and made-lands, e. Mass, to centr. N. Y. and 

 Pa. ; local. June-Aug. (Nat. from Eu.) 

 FIG. 524. 



158. C. trichocarpa Muhl. Stout and tall, 

 0.6-1.2 m. high ; culm sharply angled, rough 

 above ; leaves numerous, flat, 3-6 mm. wide, 

 very rough, but not hairy, much exceeding the 

 culm ; spikes 2-5, scattered, the lower stalked 

 and more or less spreading, 3-8 cm. long, 

 1-1.5 cm. thick, heavy, but loosely flowered 

 at base ; perigynia ovoid, many-costate, sparsely 

 short-hairy, about twice as long as the mem- 

 branaceous, acute or acuminate scales. 52 4 c. hirta 

 Marshes, s. w. Vt. to Ont., s. to Pa. and 111. 

 June- Aug. FIG. 525. Var. TURBIN\TA Dewey. Spikes 2-2.5 cm. long, 1.8-1.8 

 cm. thick ; perigynia lance-subulate. Dutchess Co., N. Y. 



Var. DewSyi Bailey. Leaves narrower, often becoming somewhat involute, 

 smoother ; spikes short, 1.5-5 cm. long, all but the lowest one sessile ; perigynia 



525. C. trichocarpa. 



