410 



CYPERACEiE. 



Carex. 



86. Carex eburnea, Boott. Bristle-leaved White Sedge. 

 Sterile spike solitary ; fertile 3-4, on exserted peduncles, erect, 3 - 6-flowered ; upper 



ones approximated, overtopping the sterile spike ; lowest one commonly remote ; perigynia 

 obovoid, triquetrous, obscurely nerved, shining , the beak short and acuminate, entire at the 

 orifice, longer than the hyaline ovate scale ; leaves setaceous. — Boott in Hook. fl. Bor.-Am. 

 2. p. 227. C. alba, Dew. Car. I. c. 7. p. 266 ; Schivein. <§• Torr. Car. 1. c. p. 341, not of 

 Scopol. C. alba, var. setifolia, Dew. I. c. 10. p. 280, and 11. p. 316. t. H. /. 26 ; Kunth, 

 enum. 2. p. 474. C. paupercula, Torr. Cyp. p. 415, not of Michx. 



Culms densely cespitose, 5-12 inches long, setaceous, smooth, sulcate, naked ; the base 

 clothed with yellowish sheaths, which terminate above in rudimentary leaves. Leaves shorter 

 than the culm, forming a radical tuft. Sterile spike 2-3 lines long, very slender ; the scales 

 lanceolate, whitish. Fertile spikes mostly 3, all clustered on the upper part of the culm, and 

 somewhat corymbose, or one of them (especially when there are 4) a little remote : peduncles 

 arising from leafless sheaths. Scales whitish and membranaceous, acute or obtuse. Perigynium 

 scarcely one line long, at first green, but brownish olive when mature, with a short abrupt 

 beak which is a little oblique ; the orifice whitish. Achenium elliptical, triquetrous, olivaceous 

 with pale angles. 



Limestone hills, Goat Island (Prof . Dewey) ; Jefferson County (Dr. Crawe) ; Trenton 

 Falls (Dr. Knieskern). Fl. May. Fr. June. A delicate little species, nearly allied to C. 

 alba of Europe, but quite distinct. 



87. Carex flexilis, Rudge. Fringed Sedge. 



Sterile spike solitary, oblong, pedunculate ; fertile 3-4, oblong-cylindrical, on nodding 

 naked peduncles ; perigynium ovoid, beaked, 2 toothed, about the length of the ovate ciliolate 

 scale ; leaves and bracts ciliate. — Rudge in Linn, trans. 7. t. 10. /. 1 ; Boott in Hook. fl. 

 Bor.-Am. 2. p. 227. C. blepharophora, Gray in ann. lyc. N. York, 3. p. 237 ; Dew. Car. 

 I. c. 30. p. 59 t. Aa. /. 85 ; Torr. Cyp. p. 427. 



Culm 12 - 18 inches high, erect, smooth, leafy at the base. Leaves about 2 lines wide, 

 pale green and somewhat glaucous, much shorter than the culm, more or less pubescent 

 especially on the under surface. Bracts very short, scale-like, not sheathing the peduncles. 

 Sterile spike three fourths of an inch long, obscurely triangular ; the peduncle about an inch 

 in length : scales tawny, oblong. Fertile spikes three fourths of an inch in length, rather 

 densely flowered, on slender filiform peduncles. Scales rather obtuse, tawny ; the midrib 

 prominent. Perigynium smooth, 2 lines long, with an acute slender conical beak. Achenium 

 oval-triquetrous, smooth. Style continuous. 



Moist shady places. Oneida county (Dr. Gray) ; on the Canal near Rome, and in Essex 

 county (Dr. Knieskern). Fl. June. Fr. July. 



