OF ARTS AND SCIENCES. 127 



C. Triguetrce, Carey, MSS. ; Olney in Proc. Am. Acad. 1868, 395. Plants taller ; 

 spikes mostly approximate at the top of the culm, oblong or cylindrical; 

 perigynium conspicuously three-angled. 



200. Carex Chapjtani, Sartwell, Exsicc.no. 113. 



C. tenax, Chapm. ; Dewey, ia Sill. Journ. 2d ser. xix. 254. 

 Aiken, South Carolina, Canby, to Middle Florida, Chapman. 



201. Carex dastcarpa, Muhl. Descr. Gram. 236. 

 Shady woods, South Carolina, Elliott, to Florida. 



202. Carex pubescens, Muhl. ; Willd. Sp. PI. iv. 281. 

 Meadows and moist woods from New England to Kentucky and 



Fort Pierre, Dakota, Hayden. 



203. Carex Coulteri, Boott, MSS. ; Hemsley in Bot. Biolog. Cent- 

 Am. iii. 473. 



Differs from C. pubescens in its longer and narrower leaves, dentate 

 orifice of the perigynium, and in its muticous scales which are pubes- 

 cent on the back. Dr. Thos. Coulter, of Dublin, was an early bo- 

 tanical explorer in Mexico and California, and the first to reach the 

 deserts of the Colorado. — So. Mexico, Zimapan, Coulter 1620; 

 Santa Fe, Valley of Mexico, Bourgeau 671. 



204. Carex triquetra, Boott, Linn. Trans, xx. 126. 

 C. monticola, Dewey, Bot. Mex. Bound. 229. 



Culm six to eighteen inches high, stiff, smooth, mostly longer than 

 the flat smooth leaves : lower bract equalling or exceeding the culm, 

 conspicuously sheathing : spikes rather loosely flowered, an inch and 

 a half or less long, the lowest commonly more or less remote and 

 peduncled : perigynium large, broadly oval or oboval, very sharply 

 angled, almost beakless, few and indistinctly nerved, sparsely pubes- 

 cent, much broader and usually longer than the green conspicuously 

 brown-margined obtuse or muticous scale. — Transition to the Dacty- 

 lostachyae. — California, Nuttall ; San Diego, Parri/, Pringle ; Lassen 

 Co., Mrs. Austin; Sierra Madre, Nevins ; Ojai, Peckham. 



205. Carex Whitneyi, Olney, Proc. Am. Acad, vii, 394. 



Differs from the last in its hairy leaves, sheathless bracts, thinner 

 and more slender perigynia, which are smooth, prominently nerved 

 and beaked (the orifice erose), and shorter than the whitish chaff-like 

 acuminate scale. The spikes upon large specimens resemble small 

 heads of barley. Transition to the Secalinaj of the Old World. Named 

 for Prof. J. D. Whitney, director of the Geological Survey of Cali- 

 fornia. — California: Mt. Shasta, Pringle; Yosemite, Brewer 1639, 

 Bolander 6198; Lassen Co., Mrs, Austin. 



