2l6 FLORA. 



Leaves 0.5 mm. wide or less. 



Perigynia obtuse, beakless ; swamp species. LEPTOCEPHALAE. 



141. C. leptalea. 

 Perigynia obovoid-oval, beaked ; prairie species. FILIFOLIAE. 



142. C. filifolia. 



133. Carex Fraseri Andr. FRASER'S SEDGE. (I. F. f. 803.) Glabrous; culms 

 smooth, slender, reclining, 2.5-5 dm. long. Basal leaves 2-4 dm. long, flat, firm, 

 spreading, finely many-nerved, their margins usually finely crumpled in drying; 

 culm leaves reduced to clasping basal sheaths ; spike solitary, bractless, terminal, 

 androgynous, 1-2.5 cm - l n g> the pistillate portion dense, about 1.2 cm. in diam- 

 eter in fruit ; perigynia ovoid, pale green, faintly many -nerved, fully 4 mm. long, 

 with a short nearly truncate beak ; scales ovate, obtuse, much shorter than the 

 perigynia. In rich woods, Va., W. Va., Tenn. and N. Car. Our largest-leaved 

 species. May-July. 



134 Carex picta Steud. BOOTT'S SEDGE. (I. F. f. 804.) Dioecious; foliage 

 glabrous, light green ; culm slender, smooth, 1.5-3 dm. long. Leaves 3-6 mm. 

 wide ; spike usually solitary, densely many-flowered, the staminate about 2.5 cm. 

 long, the pistillate narrowed at the base, 2-6 cm. long, subtended by a short 

 purple sheath ; perigynia strongly many-nerved, pubescent at least toward the 

 obtuse summit, about 3 mm. long ; scales purple, shining, obovate, acute or 

 cuspidate, longer and wider than the perigynia. In woods, Ind. to Ala. and La. 

 Summer. 



13'-. Carex scirpoidea Michx. SCIRPUS-LIKE SEDGE. (I. F. f. 805.) 

 Dioecious; foliage glabrous, rather bright green; culms erect, stiff, 1.5-4.5 dm. 

 tall. Leaves 1-2 mm. wide; spike usually solitary, linear-cylindric, 1.5-3 cm. 

 long, 3-4 mm. in diameter, subtended by a short or subulate bract ; 

 perigynia few-nerved, densely pubescent, 2 mm. long, with a very short beak ; 

 scales ovate-oval, dark purple, acute, about as long as the perigynia. In rocky 

 soil, Greenland to Alaska, south to the higher mountains of N. Eng. and Lake 

 Huron. Also in northern Europe and Asia. Summer. 



136. Carex Willdenovii Schk. WILLDENOW'S SEDGE. (I. F. f. 806.) 

 Glabrous and pale green; culms 2-10 cm. high. Leaves 2-3 mm. wide, often 3 dm. 

 long, much overtopping the spikes, the lowest reduced to sheaths ; spikes 1-5, 

 androgynous, staminate above, pistillate below, or sometimes completely staminate., 

 about 1.2 cm. long, appearing nearly basal, one of them or more on long filiform 

 stalks; body of the perigynium oblong, smooth, 2-3 mm. long, narrowed into a 

 2 -edged rough beak of about its own length ; scales lanceolate, acute, acuminate or 

 awned, finely several-nerved, the lower I or 2 commonly bract-like. In dry woods 

 and thickets, Me. to Ohio, Mich., Manitoba, Fla., Ky. and Tex. April-July. 



137. Carex Jamesii Schwein. JAMES' SEDGE. (I. F. f. 807.) Similar to 

 the preceding species, but the leaves rather narrower, soft, spreading or ascending. 

 Spikes androgynous, the terminal staminate portion slender, the pistillate flowers 

 only 1-4 and slightly separated j body of the perigynium subglobose, 2 mm. 

 in diameter, abruptly tipped by a subulate rough beak of more than its own length ; 

 lower scales bract-like, foliaceous, the upper shorter and sometimes not exceeding 

 the perigynia. In dry woods and thickets, S. Ont. and N. Y. to Ind., Iowa, D. C., 

 W. Va. and Mo. April-May. 



138. Carex durifolia Bailey. BACK'S SEDGE. (I. F. f. 808.) Glabrous; 

 culms scarcely 2.5 cm. high. Leaves 1.5-3 dm. long, 3-6 mm. wide, much over- 

 topping the spikes ; spikes 1-3, nearly basal, androgynous, I or 2 of them very 

 slender-stalked, the staminate flowers few, terminal, the pistillate 2-6, subtended 

 by leafy bract-like elongated scales which nearly enclose the inflorescence ; peri- 

 gynia oval, smooth, tapering into a stout subulate beak nearly or quite as long as 

 the body. In woods and thickets, Ont. to Manitoba., Mass., N. Y., Ohio and Neb. 

 Also in Colo, (according to Bailey). May-June. \C. Backii Boott.] 



139. Carex rupfestris All. ROCK SEDGE. (I. F. f. 809.) Culms rather 

 stout, obtusely 3-angled, erect, 2-15 cm. tall. Leaves 1-2 mm. wide, involute in 

 drying, often curved; bract subulate, erect, shorter than the terminal androgynous 

 spike or wanting ; spike 1-2.5 cm. long, the pistillate flowers few, basal ; peri- 

 gynia smooth, obovoid or elliptic, firm, faintly few-nerved, about 4 mm. long, the. 

 beak stout, cylindric, about one-half as long as the body ; scales purple-brown. 



