SYNOPSIS OF THE FLORA OF COLORADO. 141 



margin, the lowest much longer than the culm ; stigmas 2 ; perigynium 

 ovate-lanceolate, tapering into along bifid beak, spongy at base, winged, 

 serrate and waved on the margins, slightly nerved, shorter than or 

 nearly equaling the ovate-lanceolate acuminate scale, which is mem- 

 branous with bright rusty-colored margins. Colorado, 587, Vasey. 



CAREX ADUSTA, Boott. Hall & Harbour. 



CAREX STRAMINEA, Schk. Denver, B. H. Smith. Near Colorado 

 Springs, Porter. 



CAREX TENERA, Dew. Cului 15'-30' high, slender, somewhat 5-sided, 

 leafy towards the base; leaves much shorter than the culm ; spikelets 

 3-5 small, somewhat clavate, distant, nodding or erect; perigynia ovate, 

 compressed, beaked, subulate, nerved, ciliate-serrate, longer than the 

 oblong-lanceolate scale. The erect form, No. 14 of Olnetfs Carices Bor.- 

 Am. Hoopes. 



CAREX LIMULA, Fries., (not of Gray's Manual.) Culm 2-2J high, 

 acutely angled ; leaves erect, flat, rough on the margins, the sheathing 

 base-leaves not flbrillose; spikelets erect, 34, the terminal one (or some- 

 times two) staininate, the remainder pistillate, often with staminate 

 flowers at the apex, oblong, cylindrical, the lowest pedunculate; bracts 

 leafy, surpassing the culm, with small blackish auricles; stigmas 2; 

 perigynium oblong, compressed, faintly nerved, exceeding or equaling 

 the black oblong single-nerved scale ; acheniurn obovate, compressed 

 Colorado, at 11,300 feet altitude, Vasey, 582. 



CAREX JAMESII, Torr. Whole plant glaucous ; culm 8'-20' high ; 

 leaves broad, leathery, shorter than the culm, arnplectant at base, the 

 lower spreading and then incurved, with pale sheaths ; spikelets 5-6, 

 the lowest sometimes pedunculate or rarely radical on a long peduncle, 

 the two upper ones staminate, blackish purple, (the stamens brick-col- 

 ored,) the lower one small; pistillate spikelets 3, sometimes 4, oblong, 

 cylindrical, densely flowered, the uppermost sometimes with a few male 

 flowers; bracts leafy, not usually sheathing, the lowest some times short- 

 vaginate and exceeding the culm ; stigmas 2 ; perigynium obovate, 

 strongly nerved, glaucous or light-brown, the beak bidentate or emar- 

 ginate with the mouth slightly ciliated or toothed, longer than the pur- 

 plish-black scale, which has a greenish-white midrib ; achenium orbic- 

 ular. Monument Park, Porter. Weston's Pass and Twin Lakes, Coulter. 



Var. Gluey. (C. Nebraskensis, Dew.) Koot stoloniferous ; culm 16'- 

 24' high ; leaves broad, leathery, erect, nearly equaling the culm ; spikes 

 rusty-colored ; perigyuia spreading, shorter the acute, lanceolate, dark- 

 rusty scales. Greene. Oak Creek, Brandeyee. 



CAREX RIGIDA, Good. Hall d* Harbour, 588 in part. 



CAREX BUXBAUMII, Wahl. Hall & Harbour, 619. 



CAREX ATRATA, L. Hall & Harbour, 588 in part. South Park, Canby. 

 Mount La Plata, at 12,000 feet altitude, and Mount Lincoln, at the same 

 elevation, Coulter. 



Yar. OYATA, Boott. Spikes 3, oblong (the lower pedunculate with few 

 staminate flowers) dark purple ; perigynia glaucous-green. Hall & Har- 

 bour, 5^5. Summit of Pike's Peak, Canby. 



Var. NIGRA, Boott. Spikes subrotund, crowded or aggregated or the 

 lowest distinct, sessile ; perigynia oval or elliptical, cylindrically-rostrate, 

 toothed on the margins of the beak, especially above ; stigmas 2-3. 

 Hall & Harbour, 577. Gray's Peak, J)r. Smith. Canby; Brandegee ; 

 Meehan. White House Mountain, at 11,000 feet altitude, Coulter. 



