34 rBIXNDRIA MOXOUYMA 



C. ©WMMOW, S'ir'ASIXATK A*n PlSTILLlTK DISTT>*CT. ^tigmaB & 



a. Staminate Spikelet solitary. 

 + Pt\sriUa!e s]>ikcle!s subsessile, or the peduncles enclosed. 



19. C. pkn-vrylyaxfca, Irfliw. Staminate spikeld erect, pedum-uhtt 



or subseasile ; pistillate spikelets mostly 2, subapproximatc^ ovoid > 



somewhat oblong, subscssile, fuw-flowered ; fruit ovoid, obscurely trian. 



gular, beaked, subpcdicellate, roughiah tomentosc, about as long as the 



oblong-ovate acuminate glurue. Rees, Cyclop. Art. Cartx, no. 83, 



Spbcim, Gray, Gram* 2. no. 162. 



0. marginata. MtihL Beck, Bot. p. 437. and others. 



C. varia. FloruL Ceetr. p. 97. Not of MuhL and others 



PhnSSYLVANIAN CaRBX. 



Hoot with numerous long fibres. Culm 4 to 12 inches hich, Blender triquetrous 

 slightly scabrous, with a few short, narrow leaves, near tho base. Radical Icatu 

 numerous, annotinous, linear, about ae lone as ihe culm. Sfamitiatt epikelet \\n. 

 oar, eroct, on a 6h>rt peduncle, (from an ei:;hih, to half an inch long) inserted a; 

 faobaso of the upper pistillate spikelet ; glumes oblong, raiher obtust, bright p. : . 

 pltsh brown. Pistillate spikelets 1 to 3. usually 2, ov« id, ot t> •metirms rather oh 

 1 mff, 4 to 8-tlottcrcil, nearly sessile, distant from each other one thii 1 to half j^ 

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

 spikelet: glumes ol long-ovate, acuzninato, about as Long as the fruit, at first pal 

 green, finally reddish brown, white on the margin. Fruit d'bogoovtid, 3-nervd 

 or ribbed, so as to be subtriaucular, beaked, slightly bifid at apex, anl with an aJ. 

 t '-Miuatcd base about the size and length of the beak, covered with a sk»rt rougaiafc 

 pubescence. 



Hob. Dry hilly woodland*: very common. Fl. April. Fr. June. 



Obe. This I formerly took to t>e the C. varia, of authors; but, judffnsr from the 

 specimens in Dr. Gray's work, as well as from a 8|>ecimen of C. vara, authenti- 

 cated by Prof. Detcey, it seems that our plant is the C. marginata, of J'luhl. cVc. or 

 the C pennsylvanica, of l*amarck, and Gray. Dr. Gray makes the C. var/a, c.; 

 Aluhi. a variety of the C. pcnnsylranica, (vlx, Mr. Muhlenbcrgii.) which vai 

 i ty I think I have not observed in Chester County. The character! of the two, 

 however, as given in the books, seem to be a good deal blended atd confused 

 The var. Muhletibergii, of Gray, is nearly twice the size of our plant, every war 

 stouter, with much broader and more lanceolate leaves, and prettj constant!) 

 with three fertile spikelet s, — the lowest one, and sometimes the two .ower ones, 

 with a foliaceous bract at base. 



SO. C. pitbkrcbxs, % Wuhl. Staminate epikelet sub6essile ; pistillate 

 spikelets 3, oblong, erect, rather loone-flowered, the lowest one on a 

 short peduncle; fruit triquetrous, beaked, pubescent, ubout as long & 

 the ovate-oblong mucronate glume ; leaves and culm pubc*ccat. JEfcvfc, 

 Bat. p. 437. BftMlKi Gray, Gram. 2. no. 161. 



PCBKSCHST CaUKX. 



Culm 12 to 20 inches hiph, rather slender, eroct or subdecumbe.nt, tr iquctrour 

 Striate, pabe scent, leafy below. Leaves lanceolate, llat, shorter than the culm, 

 and, with the sheaths, softly pubescent. Siaminute spikelet rather shirt, neatly 

 feesile ; glumes lunce-oblonp, raiher acute, sometimes a little macronate. Pistil- 

 late spikelets mostly 3, the upper ones approximate, nearly etesiU, wiu 6hort Ian- 

 Cffhtife brac-t5 ; the lower en* rathe? distant, on a short peduncle. With i toltaccein 



