SEDGE FAMILY. 



171. Carex cephalophora Muhl. Oval- 

 headed Sedge. (Fig. 841.) 



it, -\ cephalophora Muhl.; Willd. Sp. PI. 4: 230. 1805. 



Pale green, culms slender, erect, rough above, 10'- 



tall. Leaves i // -2 // wide, sometimes overtopping 

 the culm, usually shorter; bracts of the lower spikes 

 short, bristle- form; spikes few, subglobose, densely 

 clustered in a terminal short-oblong head 4 // -8 // long, 

 the staminate flowers terminal; perigynia broadly 

 ovate, \" long or less, pale, nerveless or very faintly 

 few-nerved, tipped with a 2-toothed beak about one- 

 fourth the length of the body; scales ovate, thin, 

 rough- cur pidate or awned, equalling or a little 

 shorter than the perigynia; stigmas 2. 



In dry fields and on hills, Maine and Ontario to Mani 

 oba, south to Florida, Missouri and Texas. Abends t<> 

 i ft. in Virginia. May-July. 





Leavenworthii Dewey 



Leavemvorth's Sedge. (Fig. 8; 



Am. Joorn Sci. 

 amgttili/olim 



Ca rex Lea r r // :, < > > Ik 1 1 



246. 1846. 

 Carex cephalophora var. 



1862. 



Similar to the preceding species but mailer, calm* 

 very slender or almost filiform, erect, roughtsh. V-itf 

 tall. Leaves much narrower, ,' . i|e, mostly 



shorter than the culm; bracts of the lower 

 short, bristle-form or wanting; spike* . 

 crowded in an oblong head 4"-8" long, imilar to 

 that of C. cephalophora but usually smaller, the lower 

 sometimes compound, the staminate flower* trrmiaal; 

 perigynia orbicular-ovate, rather lea* than \" long 

 and about as wide, tipped with a very abort J toothed 

 beak; scales ovate, acute or cuspidate, shorter awl 

 narrower than the pengynia; stigmas 3. 



In meadows, Missouri to Louisiana. Ar 

 Texas. May-June. 



173. Carex Muhlenbergii Schk. Muhlenberg's Sedge. 843.) 



Care.v Muhlenbergii Schk. Riedgr. Nachtr. 12. 

 1806. 



/ 17*. 



Light green, culms slender but stiff and erect, 

 sharply 3-angled, rough, at least above, i-2,^ tall. 

 Leaves i // -2 // wide, usually shorter than the culm, 

 somewhat involute in drying; bracts bristle-form, 

 usually short; spikes 4-10, ovoid or subglobose, dis- 

 tinct but close together in an oblong head <)"-i5" 

 long, the staminate flowers terminal; perigynium 

 broadly ovate-oval, iV 2 f/ long, i" wide, strongly 

 nerved on both faces, ascending, tipped with a short 

 2-toothed beak; scales hyaline with a green mid vein, 

 ovate-lanceolate, rough-cuspidate or short-awned, 

 narrower and mostly longer than the perigynia; 

 stigmas 2. 



In dry fields and on hills, Massachusetts to Ontario 

 and Minnesota, south to Florida and Texas. May-July. 



Carex Muhlenbergii Xalapensis (Kunth.) Britton. Mrm. T.TT Clu. 5 N 

 Carex Xalapensis Kunth, Enum. a: 380. 1837. 

 i 'a rex Muhlenbergii var. enervis Boott, 111. 124. 186: 



Perigynia nearly or quite nerveless; leaves broader and longer 

 s<>uri, Texas and Mexico. 







