758 ORDER 155. CYPSRACK^,. 



pedicellate, veined, smaller than the oblong-obovate, short mucronate, dark purple, 

 white-edged glume; culm 6 to 12' high, longer than, the cauline, but shorter than 

 the radical bright-green leaves. La. (Drammond), Ala. (T. M. Peters). Curious 

 and distinct, allied to C. Baltzellii. 



80 C. virescens Muhl. (B. t. 72.) Spikes 24, oblong, erect, alternate, the lower 

 subsessile, bracteate ; upper spike very rarely wholly $ ; perig. ovate, obtuse, 

 costate, pubescent, longer than the ovate, pubescent and mucronate glume, or about 

 equal to it; st. 1 2f, rather slender; Ivs. towards the base. Whole plant pubes- 

 cent and light green. 



(3. COSTATA Schw. Perig. strongly costate, outer sheaths purplish -brown ; Ivs. 

 numerous and larger. Both are common in open woods and hedges. 



81 C. triceps MX. (B. t. 117 in part). Spikes 3, short-ovate, erect, quite near, the 

 upper short-peduncled, lowest leafy-bracted ; perig. 'obovate, obtuse, roundish- 

 triquetrous, pubescent when in flower, roughish, usually much longer than the 

 ovate acute glume; culm 1 to 2f, triquetrous, scabrous above, with shorter, sub- 

 radical, scabrous Ivs. N. Car. (Curtis) to Fia. and Ala. Differs considerably from 

 the following, although the two are united by Boott 



82 C. hirstita Willd. (Schk., fig. 1*72.) Spikes 3, short-oblong, thick, alternate, 

 erect, ratJier near, upper subsessile, lowest pedunculate, all dense-flowered ; perig. 

 ovate-triquetrous, obtusish, entire at the orifice, veined, very pubescent when young, 

 rough and glabrous in maturity, longer than the ovate, acuminate, glabrous 

 glumes; culm 12 to 18', stout, erect, scabrous above; Ivs. and sheaths strongly 

 scabro- pubescent, grayish green. Moist upland meadows, Can. to Penn., and 

 far West. 



/?. PEDUNCULATA (Torr.) Spikes oblong-cylindric, pedunculate; Ivs. slightly 

 pubescent ; young glumes much longer than the perigynium. 



y. CUSPIDATA. (Dew.) Grlumes ovate, cuspidate, longer than the perig. ; Ivs., 

 sheaths,- and culm very hirsute. 111. (Vasey). 



83 C. aestivalis Curtis. (B. t. 133.) Spikes 3 to 5, cylindric, slender, suberect, 

 loose-flowered, bracteate ; $ glumes oblong, rather obtuse at the base of the upper 

 spike, lowest spike pedunculate; perig. elliptic, 3-sided, tapering at both ends, 

 glabrous, entire at orifice, longer than the ovate, obtuse, often mucronate glume ; 

 culms in tufts, 16 to 24', slender, with flat, pubescent Ivs., and leafy bracts. Mts. 

 of N. Car. (Curtis), also on Saddle Mt, Mass. (Dewey). Jl., Aug. 



84 C. Shortiazia Dew. Spikes 4 or 5, long-cylindric, erect, dense-flowered, the 

 highest half-staminate below, the others nearly all fertile, exsert-pedunculate ; 

 perig. obovate, obtuse, convex-compressed, tapering at base and subpedicellate, 

 minutely apiculate, scarcely longer than the ovate, acute glume; culm 12 to 30', with 

 long Ivs. ; plant strong and fine, bright green. Marshes, Penn. to 111. and farther 

 South. A distinct and beautiful species. 



85 C. oxylepis Torr. (B. t. 131.) Spikes 3 to 6, long-cylindric, erect, exsert-pe- 

 dunckd, bracteate, the lower remotish and loose-flowered at the base ; perig. ob- 

 long, subtriquetrous, glabrous, tapering at either end, 2-lobed or notched at orifice, 

 a little longer than the ovate-oblong, cuspidate, white edged glume; culm 15', erect, 

 rather slender, leafy, pale green; spikes rather dark. Fla. (Chapman) to Tex. 

 (Torr.) 



86 C. Buxbaumii Wahl. Spikes about 4, short, cylindric, thick, upper one 

 sometimes wholly $ , and sometimes $ above and below ; pistiliferous oblong, 

 subremote, subsessile, bracteate; perig. ovate-oblong, acutish, or obovate, obtuse, 

 subtriquetrous, entire at the orifice, nerved and glabrous, scarcely equal to the ob- 

 long and mucronate glume; st. 10 18' high, leafy towards the base. Common in 

 wet grounds. It is described as sometimes having 2 stigmas in Europe, but placed 

 by Schk., Wahl, &c., in the division having 3. 



87 C. atrata L. Spikes 3 to 5, oblong-ovate, somewhat nodding, the upper rather 

 near and sessile, lower pedunculate, scarcely sheathed; perig. roundish-oval, com- 

 pressed, glabrous, short-beaked, slightly bidentate or notched, a little shorter than 

 the dark, oblong glume; culm about If, with light green foliage and black spikes. 

 White Mts. and Brit. Am. 



88 C. gracillima Schw. (B. t 134.) Spikes 3 4, long, graceful, sub-loose- 

 flowered, distant, long-pedicellate, recurved in maturity, bracteate, upper one 



