584 CLX. CYPERACE^. Carex. 



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



tillaie. 



61. C. viREscENs. Muhl. 



Spikes 2 — 4, oblong, erect, alternate, the lower subsessile, bracteate ; tipper 

 spike very rarely wholly ,^ ; perig. ovate, obtuse, costate, pubescent, longer than 

 the ovate, pubescent and mucronate glume, or about equal to it ; 5/. 1 — 2f high, 

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

 0. costata. Schw. Perig. strongly costate, mtter slwaihs purplish-brown ; Ivs. 

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



62. C. niRsuTA. 



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 ; 5/.' 12 — 20' high; Ivs. and sheaths retrorsely 

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

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

 pubescent. — Common. C. triceps (M.c.) much resembles this, — is not pubes- 

 cent but glabrous. 



63. BuxBAUMii. Wahl. 



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

 sometimes J^ above and below; pistilUferoiis 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 

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

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



64. C. GRACILLIMA. Schw. 



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

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

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

 obtuse and short-awned glume ; 5^. often 2f high, reddish towards the base, 

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



65. C. FORMOSA. Dew. 



Spikes 3 — 1, 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 ; 5^. 1 — 2f high, 3-sided, dark brown towards the base, yellowish 

 bright green. — Common in wet nieadows. 



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



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

 dulous in maturity; peri^:. oblong-conic, subinflated, subtriquetrous, nerved, 

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

 equaling the oblong, .scabrous-awned glume; 5^ 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- 

 lonic in Mass., Dewey. Sometimes nearly pubescent. 



G. Staminate spike siiigle. 



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



diverging. 



67. C. VARiA. Muhl. 



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

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

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

 glume; st. 6 — 15' high, erect, slender, purple towards the base. Pale green. — 

 Dry woods and hedges; common. 



/?. pedicella'.a. Dew, has pistillate spikes ovate-oblong, short-pedicellate, 

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



