ORDER CXLI. CYPERACE^. 567 



§ 2. Spikes numerous ; terminal ones sterile or androgynous, base 

 staminate. 



22. C. dasycar'pa, (Muhl.) Stem triquetrous, glabrous. Leaves 

 very narrow, lanceolate, linear, glabrous. Sterile spike very small, 

 terminal; scales lanceolate. Fertile spikes generally 3, near each 

 other, upper sessile. — Car. and Geo. 



23. C. tri'ceps, (Mich.) Stem acutely angled, slender, scabrous along 

 the margins. Leaves linear, pubescent at the base. Spikes usually 4, 

 approximate, sessile, 3 of them larger than the other. Glumes ovate. 

 F'aleaz shorter than the glume, glabrous. Fruit ovate, compressed, 3- 

 angled. — 2f. April — May. Damp soils. 12 — 18 inches. 



24. C. hirsu'ta, (Willd.) Stem 3-angled, slender, pubescent near the 

 summit. Leaves narrow, slightly pubescent. Spikes 3 — 4, the termi- 

 nal one sterile at the base, lower ones on short peduncles. Fruit ovate, 

 obtuse. — 2f . May — June. Southern Geo. 10 — 12 inches. 



25. C. buxbau'mii. Stem slender, 3-angled. Leaves narrow, with 

 scabrous margins. Spikes 3 — 4, the terminal one, with the lower half, 

 bearing sterile flowers. Glumes lanceolate, dark-colored. Palece light- 

 colored, 2-cleft at the summit. Fruit elliptic, as long as the glume. — 

 If. July — Aug. Swamps. 1 — 2 feet. 



§ 3. Staminate spikes solitary or 1 — 3 ; pistillate 1 — 3, generally sessile. 



26. C. va'ria, (Mueh.) Stem erect, slender, with scabrous angles. 

 Leaves subulate. Fertile spikes generally 3, nearly globose ; sterile 

 spike terminal. Glumes oblong-lanceolate, tinged with brown. Palece 

 pubescent. Fruit sub-globose, hispidly pubescent, obtusely 3-angled. 

 — If. April — May. Dry woods. 8 — 12 inches. 



27. C. margina'ta, (Mueh.) Stan slender, 3-angled. Leaves linear, 

 with slightly scabrous margins; fertile spikes generally 2, sub-globose, 

 approximate, the sterile one terminal, cylindrical, long. Glumes ovate, 

 brown, with a white margin. Fruit globose, pubescent, longer than the 

 glume. — 2f. April — May. Dry soils. 8 — 12 inches. 



28. C. plantagin'ea, (Lam.) Stem erect, glabrous, with purple 

 sheaths, nearly leafless. Leaves linear, nerved, glabrous. Sterile spike 

 terminal ; fertile ones mostly 4, distant, erect, linear, the lower ones on 

 long peduncles. Bracts leafy, sheathing the peduncle. Frtiit oblong, 

 cuneiform, recurved at the apex. — 2f. April — May. Shaded soils. 

 S — 12 inches. 



29. C. conoi'dea, (Schkuhr.) Stem 3-angled, the angles scabrous. 

 Leaves narrow, flat, scabrous along the margin. Fertile spikes 2 — 3, 

 remote, the lower ones on long peduncles ; sterile spike terminal, small, 

 with lanceolate glumes ; the lower bracts leaf-like. Fruit conical, ob- 

 tuse, recurved at the apex. — If. April. Wet soils. About 1 foot. 



Var. C. tetan'ica, (Ell.) Stem slender, glabrous, 3-angled. L,eaves 

 linear, shorter than the stem. Fertile spikes 2, distant, the upper one 

 nearly sessile, the lower on a long peduncle ; the sterile spike on a long 

 peduncle. Glumes mucronate. Fruit ovate-oblong, acute at each end, 

 oblique. — If. May. Wet soils. 12 inches. 



30. C. an'ceps, (Mueh.) Stem 3-angled, compressed. Leaves broad. 

 Fertile spikes 3, loosely flowered, cylindric. Bracts sheathing. Fruit 



