CYPERACEAE 351 



ovoid-oblong, closely 4- to 8-flowered ; perigynia roughish, roundish- 

 ovoid, with a short abrupt beak, about as long as the ovate acumin- 

 ate reddish-brown scale. 

 PENXSYLVANIAN CABEX. 



Culms 4 to 12 inches high, slender, with a few short narrow leaves at base. 

 Radical leaves annual, linear, about as long as the culm. Slam,, spikelets % an 

 inch to near an inch long, erect, on a peduncle % to J^ an inch in length, inserted 

 at the base of the upper pistillate one. Pistillate spikelets % to % of an inch long, 

 the lower one often with a linear or setaceous bract at base, longer than the 

 spikelet. 

 Hak. Dry, hilly woodlands : common. Fl. April. Fr. June. 



Obs. The C. Varia, Muhl. with "wider, shorter, and more rigid 

 glaucous leaves," is so nearly allied to this, that I have not dis- 

 tinguished it sufficiently to be warranted in giving it a place in our 

 Chester County Flora. 



WV. C. pub^scens, Muhl. Staminate spikelet subsessile ; pistil- 

 late spikelets about 3, oblong, or cylindric, erect, rather loose- 

 flowered; perigynia densely pubescent, trigonous-ovoid, with an 

 abrupt slender beak, about as long as the ovate-oblong mucronate 

 white scale. 

 PUBESCENT CAREX. 



Culms 12 to 20 inches high, erect or sub-decumbent, pubescent, leafy below. 

 Leaves shorter than the culm, lance-linear, flat, and, with the sheatfis, softly pub- 

 escent. Stam. spikelets % an inch to an inch long. Pistillate spikelets % to % of 

 an inch in length, the upper ones approximated, nearly sessile, each with a short 

 lanceolate brad, the lower one rather distant, on a short peduncle, with a foliar 

 ceous bract nearly equalling the culm. 

 Hab. Woodlands ; along Brandywine : frequent. FL May. Fr. June. 



2 6. Perigynia slightly inflated ; bracts long and leaf-like ; culms tall and leafy. 



28, C. liiiliacea, Muhl. Staminate spikelet sub-clavate, pedun- 

 culate, often pistillate at summit; pistillate spikelets mostly 3, 

 long, slender, nodding on filiform peduncles ; perigynia smooth and 

 thin, rather longer than the oval, obtuse or emarginate, mucronate, 

 white scale. 



MILLET-LIKE CAREX. 



Culms 1 to 2 feet high, slender, leafy. Leaves nearly as long as the culm, nar- 

 rowish. Stam. spikelet about an inch long. Pistillate spikelets 1 to 2 inches long, 

 somewhat approximated, rather loose-flowered, occasionally solitary ; bracts sur- 

 passing the culm, with short or nearly obsolete sheaths. 

 Hob. Moist meadows, and low grounds : frequent. Fl. May. Fr. July. 



29. C. scabrata, Schw. Staminate spikelet on a rigid scabrous 

 peduncle ; pistillate spikelets 3 to 5, often 4, the lowest one distant 

 and long pedunculate ; perigynia oblong-ovoid, scabrous and thick- 

 ish, rather longer than the ovate-lanceolate brown scale. 



ROUGH CAREX. 



Whole plant scabrous. Culms 1 to 2J^ feet high, rather stout, striate, leafy. 

 Leaves 1 to 2]4 feet long, and often % an inch wide. Stam. spikelet 1 to 1% inches long, 

 on & peduncle % of an inch to 2 inches in length. l*i$tillate spikelets 1 to 2 inches 

 long, rather dense-flowered, the upper one nearly sessile, the others peduncu- 

 late ; bracts very long, nearly without slteaUis. 

 Hab. Shaded swamps; Birmingham : not common. Fl. May. Fr. July. 



