38 TRIANDRIA MONOGYNIA 



Culm 6 to 12 inches high, 6lendcr, triquetrous, angles sharp and prominonL 

 leafy, somewhat decumbent. Leaves lancc-linear,thin and delicate, scabrous on 

 the margin, upper ones surpassing the culm, lower ones abbreviated ; sheaths short. 

 Staminate spikelet on a short slender peduncle, from tin; bract of the upper pistil 

 late ; glumes ovate-lanceolate, with a grocn keel, the lower one large. Pistillute 

 spikelets about 3, ofttfn only 2, distant, oblong, 5 to 9-flowcred; upper one often sub- 

 sessile, the lower ones on long, filiform, exsert peduncles ; the lowest frequently 

 sub-radical : glumes ovate, acute, about two-thirds the length of the fruit. Fruit 

 triquetrous, striate, very loosely arranged on the rachis, with a short, oblique, 

 obtuse beak (sometimes scarcely beaked). Seed triquetrous. 



Hob. Hilly woodlands : West Chester : frequent. Fl. May. Fr. July. 



Obs. The var.latifolia, Gray, with much larger, glaucous leaves, is also found 

 here. Dr. Gray sup|x>scs It may be the C. digitalis, of Muhl. and Witld* In some 

 of my specimens, the terminal spikelet is androgynous, with fruit at the summit. 



27. C. scabhata, Schxv. Staminate spikelet on a rigid scabrous pe- 

 duncle ; pistillate spikelets 4 or 5, somewhat distant, sub-cylindric, most- 

 ly erect, lower ones long-pedunculate ; fruit oblong-ovoid, with an ob- 

 lique beak, scabrous, rather longer than the ovate-lanceolate glume. 

 Beck, Bet. p. 440. Icoy, Sch-w. & Torr. JMonogr. tab. 26. /. 2. 

 Specim. Grai/, Gram. 2. no. 179, 

 Rough Carex. 



Culm 1 to 2 feet high, acutely triquetrous, and scabrous above, somewhat ancip* 

 ital below, striate, leafy. Leaves linear-lanceolate, broadish, nerved, 6cabrous» 

 particularly on the margin and upper surface, about as long as the culm, the upper 

 Mnes surpassing it. Staminate spikelet on a rigid, grooved, scabrous peduncle 

 about three-fourths of an inch long ; glumes lanceolate, lower ones somewhat dis- 

 tant, bract-like. Pistillate spikelets 3 to 5, often 4, rather densely fruited, the up- 

 per one nearly sessile, the others pedunculate, the lowest one remote and long 

 pedunculate, a little nodding ; glwms ovate-lanceolate, scabrous at the points, 

 shorter than the fruit : bracts foliaceous, the lower ones much surpassing the culm, 

 sheaths short. Fruit ovoid, attenuate at base, subventricose. nerved, sides keeled 

 or strongly ribbed, very scabrous, spreading when mature, so as to give tho spike- 

 bt a squarrose appearance. Seed triquetrous, puncticulate. Plant dark green. 



Hab. Shaded swamps : E. Darlington's meadow : not common. jFT. May. Fr. July 



28. C. iaxiflora, Lam. Staminate spikelet subscssile, slender; pis- 

 tillate spikelets about 4, rather loose-flowered, the lower ones remote, 

 pedunculate ; fruit ovoid-oblong, rather obtuse, striate, glabrous, rather 

 longer than the ovate cuspidate glume. Beck, Bot. p. 440. Specim. 

 Gray, Gram. 2, no. 181. 



LoOSE-FLOWERED CaRXX. 



Cvlm 12 to 18 inches high, triquetrous, smooth, leafy. Leaves lance-linear, flat, 

 scabrous on the margin ; the upper ones, or bracts, surpassing the culm ; sheaths 

 white and membranaceous opposite the leaves. Staminate spikelet short, subpe> 

 dunculate, inconspicuous ; glumes lanceolate, acute and mucronate, the lower 

 «nes long, bracMike, ciliate. Pistillate spikelets 3 or 4, (v«ry often 4,) oblong, 

 rather few-flowered, the two upper approximate, with the staminate one between 

 them, the lower ones distant, the lowest one on a pretty long peduncle; glumes 

 ovate, whitish or pale green, acuminate into a scabrous awn which projects be- 

 vond the fruit. Fruit ovoid-oblong, obscurely triangular, smooth and somewhat 





