SYNOPSIS OF THE FLORA OF COLORADO. 139 



pressed, triquetrous, shining, at length horizontally spreading or re- 

 flexed, rusty -colored, the orifice cleft in front with its hyaline margins 

 infolded, longer than the acute-lanceolate or obtuse-oblong rusty-brown 

 scale; lowest scale rarely subleafy; acbenium unequally triquetrous. 

 Caespitose; root fibrous. Hall & Harbour, 608. 



CAREX HALLII, Olney. Hayderfs Rep., 1871, p. 496. (C. Parryana, 

 Boott, in part.) Monoecious or dio3cious; sometimes with two erect 

 spikes, one staminate and one pistillate, or with 1-3 spikes all pistillate ; 

 terminal spike much the largest, lower one often remote and subtended 

 by a leafy bract; scales lanceolate or lance-ovate, brown, with a white 

 midrib, entire, not ciliate, longer and narrower than the obovate, smooth, 

 many-nerved perigynium; stigmas 3. Hall & Harbour, 617. 



CAREX SCIRPOIDEA, MX. Hall & Harbour, 610. South Park, Porter 

 and Canby. 



CAREX POLYTRICHIOIDES, Muhl. Hall & Harbour, 603. 



CAREX AFFINIS, R. Br. u Spike solitary, staininate at top ; stigmas 

 3 ; scales acute, lanceolate, the lower awned. Near. C. polytriclioides, 

 Muhl." Olney in King's Rep., vol. 5, p. 3V2. Vasey, 591. 



C A.REX OBTUSATA, Lilj. Terminal spike solitary, linear, androgynous, 

 staminate above ; stigmas 3 ; scales shorter than the perigynium ; 

 perigynium ovate-elliptical, turgid, shining, with a smooth, " terete, 

 acuminate, bifid beak, white and diaphanous at the apex, leaves linear, 

 flat. Hall & Harbour, 606. 



CAREX BACKII, Boott. Hall& Harbour, 612. 



CAREX FLLIFOLIA, Nutt. Ca3spitose ; spikes simple, androgynous, 

 staminate above, subcylindric, acute ; perigynium subglobose, entire at 

 the orifice; scales retuse; leaves filiformly-involute, shorter than the 

 culm. Xutt. Gen., vol. 2, p. 204. Hall & Harbour, 605. Ute Pass, Porter 



CAREX PAUCIFLORA, Lightfoot. Hall & Harbour, 607. 



CAREX DISTICIHA, Hudson. South Park, Porter. 



CAREX COXJD:;OTA, Boott. Along the Platte, Coulter. 



CAREX MURICATA, L., var. GRACILIS, Boott, in part. Spikes ches- 

 ntit-colored, narrow, ovate, with 4-6 ovate few-flowered spikelets ; leaves 

 lax, long and narrow. Hall & Harbour, 592. Weston's Pass, Coulter. 



CAREX DOUGLASII, Boott. Boot creeping; culm 6 / -12 / high; spike 

 dioecious, with about 12, sometimes more, ovafe spikelets, the upper 

 closely aggregated, the lower occasionally remote and compound; bracts 

 sometimes setaceous, broad at base, sometimes scale-like and mucronate; 

 style exserted, stigmas 2, very long; perigynium elliptic-lanceolate or 

 ovate, tapering to a long serrated bifid beak, shorter than the lanceolate 

 acute scale ; achenium orbicular. Near Long's Peak, Coulter. 



Var. MINOR, Olney. (C. petasata, Dew., in Hay den's Xebraska Plants. 

 Spikes small, not closely aggregated; perigynium and scale small. Hall 

 & Harbour, 600. 



CAREX SICCATA, ~Dew.Hall & Harbour, 593. 



CAREX MARCIDA, Boott. Culm l-2 high, rigid ; leaves broad, linear, 

 erect; spike oblong, pale, composed of numerous small ovate aggregated 

 androgynous spikelets, stamiuate at top, the lower spikelets compound; 

 stigmas 2; perigynium tawny, sub-orbicular, or ovate tapering to a bifid 

 beak, plano-convex, nerved, winged, the upper margins Berratnl, short- 

 stipitate, nearly equal to the acute ovate scale, which is of a pale straw- 

 color with a white membranous margin ; achenium tawny, lenticular, 

 contracted at base. Hall & Harbour , Greene. 



