Carex. 



CYPERACEiE. 



403 



perigynium ; the keel green. Perigynium about three lines long, a little inflated at the base, 

 nerved, attenuated to a long curved slightly bifid beak. Achenium obovoid-triquetrous. Style 

 continuous. 



Wet meadows : frequent. Fl. May. Fr. June. This species is common in Europe. 



7J. Carex CEderi, Ehrh. CEders Sedge. 



Sterile spike nearly sessile ; fertile mostly 3, ovoid-oblong, nearly sessile, densely flowered ; 

 perigynia ovoid-globose, smooth, horizontal, with a short straight beak, longer than the ovate- 

 lanceolate scale. — Schk. Car. I. p. 67. t. F.f. 26 ; Michx. fl. 2. p. 171 ; Dew. Car. I. c. 10. 

 p. 38 ; Scliwein. Sf Torr. I. c. p. 334. C. flava, (3. patula, Schk. I. c. 2. p. 56. C. flava, 

 var. CEderi, Kunth, enum. 2. p. 446. C. viridula, Michx. I. c. p. 170, not of Schwein. Sf 

 Torr. C. irregularis, Schwein. anal. tab. I. c. 



Culm 3-12 inches high, rather stiff, obtusely triangular, smoothish. Leaves mostly 

 radical, shorter than the culm. Sterile spike 4-8 lines long, commonly sessile or nearly so, 

 sometimes androgynous : scales lanceolate, light brown, obtuse. Fertile often 2, sometimes 

 4, usually approximated, but often (especially the lowest one) more or less remote, about half 

 an inch long, now and then with a few sterile flowers at the summit. Scales one third longer 

 than the perigynium, light brown, acute or obtuse. Perigynium about a line and a half long, 

 strongly nerved, with a conical rostrate point, very slightly bifid at the extremity. Achenium 

 obovoid-triquetrous. Style continuous. 



Shore of Lake Ontario, near Sacket's Harbor {Dr. Gray) ; Niagara Falls {Prof. Dewey). 

 Fl. May. Fr. June. A native also of Europe. Many botanists regard this plant as a variety 

 of C. flava. It differs, however, in the more densely flowered spikes and much smaller 

 perigynium, as well as in the shorter and straighter beak. The whole plant, as in that species, 

 is of a yellowish color. 



72. Carex pallescens, Linn. Pale Pubescent Sedge. 



Sterile spike solitary, on a short peduncle ; fertile 2-3, on exserted peduncles, ovoid- 

 cylindrical, approximated, densely flowered, finally somewhat cernuous ; perigynium obovoid- 

 oblong, obtuse, smooth, about as long as the scale ; culm and leaves pubescent. — Linn. sp. 2, 

 p. 917 ; Schk. Car. t. Kk. /. 99 ; Dew. Car. I. c. 7. p 267 ; Schwein. Torr. Car. I. c. 

 p. 354 ; Kunth, enum. 2. p. 458. 



Culm 12-18 inches high, erect, slender, triquetrous, leafy below. Leaves 1-2 lines 

 wide ; the sheaths retrorsely pubescent. Sterile spike clubshaped, about three fourths of 

 an inch long ; the scales lanceolate, very acute, light brown. Fertile spikes half an inch or 

 more in length, thick, obtuse, at first erect, when old more or less cernuous. Scales ovate, 

 acuminate, brown with a green keel. Perigynium 1 £ line long, very obtuse, pale green when 

 ripe ; the orifice minute and entire. Achenium obovoid-triquetrous. Style somewhat articulated. 



Wet meadows : not common. Fl. May. Fr. June. This species is also a native of 

 Europe. 



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