OF ARTS AND SCIENCES. 91 



89. Carex verrucosa, Mulil. Descr. Gram. 261. 



C. glaucescens, Ell. Sk. Bot. ii. 553. 



C. glaucescens, var. androgijna, Curtis, Sill. Journ. xliv. 84, and 

 \ax. polystachya, Sill. Journ. 2d ser. vii. 410. 

 Margins of pouds, mostly in pine barrens, Virginia to Florida and 

 Texas. 



90. Carex Ehrenbergiana, Boeckeler, Linnsea, xli. 175. 



" Somewhat glaucous-green : culm strict and very rigid (one to two 

 and a half feet high and as thick as a fowl's quill), acutely angled, 

 scabrous above : leaves very rigid, shorter than the culm (one to two 

 and a half lines wide), shortly acuminate, carinate, many striate, rough 

 above, the margins somewhat revolute : spikes 7-10, red-ferruginous, 

 all more or less peduncled, narrowly cylindrical, acutish, densely 

 flowered (one to four feet long and two to two and a half lines wide), 

 the upper two or three staminate, crowded and nodding with the two 

 lowest of them often short, the others approximate, androgynous, with 

 the staminate flowers borne on the prolonged apex, borne in twos or 

 threes (the lowest solitary), and long exsertly peduncled, some of the 

 lower ones more or less branched at the base : bracts leafy, nearly 

 sheathless, the lower about equalling the culm : scales broadly ovate 

 or oval, obtuse or muticous, or the keel sometimes prolonged into a 

 short cusp, dark-colored, spreading, as are also the perigynia : peri- 

 gynium small (scarcely a line long), shorter than the scale, smooth 

 and nerveless, broadly obovate or nearly orbicular, attenuated at the 

 base, pale straw-colored, punctate with resinous dots, ending abruptly 

 in a short, nearly entire beak : stigmas three or two." Transition to 

 the Polystachyse. — Mexico, C. Ehrenberg. 



91. Carex scaberrima, Scheele, Linnaea, xxii. 345. 

 Known only from Scheele's description : — 



" Culm a foot or eighteen inches high, lax, triquetrous, striate, rough 

 above : leaves flat, glabrous, elongated, three-nerved, striate, narrowly 

 acuminate, the mid-nerve very rough, the sheaths transversely rugose- 

 plicate : spikes five, linear-cylindrical, remote, the two upper short, 

 obtuse, sessile, and staminate, the others longer, androgynous, and 

 acute : androgynous spikes peduncled, densely many-flowered, stami- 

 nate at the top, the lowest sub-radical, very long, the remainder very 

 short, pedunculate : uppermost bract small, setaceous, the second long- 

 awned with a green mid-nerve, shorter than the spike : pistillate scales 

 ovate at the base, white-hyaline, lanceolate, the nerve excurrent, 

 cuspidate-aristate, longer than the perigynium : staminate scales nar- 

 row, oblong, whitish, membranaceous, nerve green, very short, mucro- 



