584 CLX. CYPERACE^E. CAREX. 



F. Terminal spike androgynous, pistillate at the summit ; the other pis- 

 tillate. 



61. C. VIRESCENS. Muhl. 



Spikes 2 4, 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. I 2f high, 

 rather slender ; Ivs. towards the base. Whole plant pubescent and light green. 

 /?. costata. Schw. Perig. strongly costate, outer sheaths purplish-brown ; Ivs. 

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



62. C. HIRSUTA. 



Spikes 3, short-oblong, thick, alternate, erect, the lower subsessile and long- 

 bracteate, all approximate and densely flowered; perig. ovate, triquetrous, 

 nerved, obtuse, entire at the orifice, glabrous in maturity, about equal to the 

 ovate, acuminate, glabrous glume ; st. 12 20' high ; Ivs. and sheaths retrorsely 

 pubescent ; upper spike very rarely all tf. Moist upland meadows. Common. 

 /?. pedunculata. Torr. Spikes oblong-cylindric, pedunculate ; Ivs. slightly 

 pubescent. Common. C. TRICEPS (Me.) much resembles this, is not pubes- 

 cent but glabrous. 



63. BUXBAUMII. Wahl. 



Spikes about 4, cylindric, thick, upper one sometimes wholly ^, and 

 sometimes $ above and below; pistilliferous oblong, subremote, subsessile, 

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

 entire at the orifice, nerved and glabrous, scarcely equal to the oblong and mu- 

 cronate glume ; st. 10 18' high, leafy towards the base. Common in wet 

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

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



64. C. GRACILL1MA. Schw. 



Spikes 3 4, long, graceful, sub-loose-flowered, distant, long-pedicellate, 

 recurved in maturity, bracteate, upper one rarely all tf ; perig. oblong, trique- 

 trous, obtuse, oblique at the orifice, slightly 2-lobed, longer than the oblong and 

 obtuse and short-awned glume ; st. often 2f high, reddish towards the base, 

 leafy and subprocumbent, pale green. Common in damp meadows. 



65. C. FORMOSA. Dew. 



Spikes 3 4, oblong, short and thick, distant, 1-sided, on a long and slen- 

 der peduncle, recurved; perig. oblong, triquetrous, subinflated, acutish at either 

 end, nearly entire or 2-lobed at the orifice, twice longer than the ovate and 

 acute glume ; st. 1 2f high, 3-sided, dark brown towards the base, yellowish 

 bright green. Common in wet meadows. 



66. C. DAVISII. Torr. (C. Torreyana. Dew.) 



Spikes 4, oblong, cylindric, subsparsely flowered, remote, pedicellate, pen- 

 dulous in maturity; perig. oblong-conic, subinflated, subtriquetrous, nerved, 

 acutish, short-rostrate, 2-lobed at the orifice, glabrous towards maturity, about 

 equaling the oblong, scabrous-awned glume ; st. 1 2f high, triquetrous, sca- 

 brous above, with leaves equaling it ; Ivs. and sheaths pubescent, sometimes but 

 very little, light green. First found on the alluvial meadows of the Housa- 

 tonic in Mass., Dewey. Sometimes nearly pubescent. 



G. Staminate spike single. 



1. Pistillate spikes short and sessile or nearly sessile. Peryginia radiating or 



diverging. 



67. C. VARIA. Muhl. 



cf Spike erect, short or subelongated ; 9 spikes 3, ovate, sessile, rather 

 near, bracteate, few-flowered ; perig. ovate or sub-globose, subtriquetrous, acu- 

 minate-rostrate, bifid, scabro-pubescent, about equal to the ovate, acuminate 

 glume; st. 615' high, erect, slender, purple towards the base. Pale green. 

 Dry woods and hedges ; common. 



13. pedicellata. Dew, has pistillate spikes ovate-oblong, short-pedicellate, 

 erect, loose-flowered ; perig. more numerous. Grows in the same situations. 



