202 FLORA. 



Pistillate spikes oblong, globose or cylindric; scales equalling the perigynia of 

 longer. 

 Bracts manifestly sheathing; arctic species. Ferrugineae. 6i. C. tnisandra. 

 Bracts sheathless; scales mostly dark. Pendulinae. 



Pistillate spikes narrowly cylindric; southern coast species. 



62. C. littoralis. 

 Pistillate spikes oblong or globose; northern species. 



Scales not longer than the perigynia. 



Pistillate spikes 6-12 mm. long, few-flowered; scales obtuse. 



63. C. rariflora. 

 Pistillate spikes 1-2 cm. long, several-flowered; scales acute. 



64. C. limosa. 

 Scales distinctly longer than the perigynia. 



Perigynia oval or suborbicular. 65. C. Magellanica. 



Perigynia elliptic-lanceolate. 66. C. podocarpa. 



Culms tall, usually stout; pistillate spikes 2-10 cm. long; scales 1-8 times as long as the 

 perigynia; stigmas 2 (or 3 in Nos. 70 and 71). Cryptocarpae. 

 Perigynia smooth. 



Scales purple-brown; arctic species. 67. C. cryptocarpa. 



Scales green ; plants not arctic. 



Perigynia nerveless or faintly nerved, much shorter than the scales. 



Perigynia nearly orbicular, biconvex. 68. C. maritima. 



Perigynia obovoid, obtuse. 69. C. crinita. 



Perigynia oblong or elliptic, acute. 70. C. gynandra. 



Perigynia strongly several-nerved, about equalling the scales. 



Spikes erect; leaves very rough-margined. 71. C. tnacrokolea. 



Spikes droOping, filiform stalked. 71a. C. verrucosa. 



Perigynia granular or papillose. 72. C. glauca. 



59. Carex torta Boott. Twisted Sedge, (I. F. f. 729.) Glabrous ; culm 

 slender, smooth or slightly scabrous above, 0.4-1 m. long. Leaves about 4 mm. 

 wide, those of the culm very short; sheaths not fibrillose; lower bract commonly 

 foliaceous; staminate spikes 1-3, stalked; pistillate spikes 3-5, all but the upper 

 spreading or drooping, linear, 2-7.5 cm - l° n g> about 4 mm. in diameter; often 

 loosely flowered toward the base; perigynia oblong or narrowly ovate, green, nerve- 

 less, narrowed and more or less twisted above, 2-3 mm. long; scales ovate, purple- 

 brown with a green midvein, shorter and mostly narrower than the perigynia; 

 stigmas 2. In marshes and wet thickets, Me. and Vt. to N. Car. and Mo. 

 June-July. 



60. Carex prasina Wahl. Drooping Sedge. (I. F. f. 730.) Glabrous; 

 rather light green; culm slender, smooth or nearly so, reclining, 3-angled, 0.3- 

 0.7 m. long. Leaves flaccid, roughish, 3-5 mm. wide; lower bract similar, com- 

 monly overtopping the spikes; staminate spike short- stalked, often pistillate at the 

 summit; pistillate spikes 2 or 3, linear-cylindric, drooping, the lower filiform- 

 stalked, 2-6 cm. long, 4 mm. in diameter, rather loosely many-flowered; perigynia 

 light green, lanceolate, obscurely nerved, tapering into a slender minutely 2-toothed 

 teak; scales ovate, acute, acuminate, or short-awned, pale green, shorter than the 

 perigynia; stigmas 3. In meadows and moist thickets, Me. to Ont., N. J. and 

 Perm., south in the Alleghanies to Ga. May -July. 



61. Carex misandra R. Br. Short-leaved Sedge. (I. F. f. 731.) Gla- 

 brous; culms 2-40 cm. tall. Leaves 2-3 mm. wide, clustered, seldom over 6 cm. 

 long; bracts narrowly linear, sheathing, not overtopping the spikes; terminal spike 

 slender-stalked; pistillate spikes I or 2, filiform-stalked, 6— 15 mm. long, about 

 4 mm. thick, rather few-flowered, drooping; perigynia narrowly lanceolate, acumi- 

 nate, narrowed at the base. 3 mm. long, dark brown, denticulate above; scales ob- 

 tuse, purple-black with white margins, somewhat shorter than the perigynia; stig- 

 mas 2 or 3. Throughout arctic America, extending south in the Rocky Mts. to the 

 higher summits of Colo. Also in arctic Europe and Asia. Summer. 



62. Carex littoralis Schwcin. Barratt's Sedge. (I. F. f. 732.) Glabrous. 

 pale green, somewhat glaucous; culms smooth, 0.20.5 m * ^ a ^» leafless above. 

 Leaves 3-4 mm. wide, smooth, the lower sheaths fibrillose; bracts not sheathing, 

 the lower usually short and narrow; staminate spikes 1-3. usually rather long- 

 stalked; pistillate spikes 2-4, drooping or the upper ascending, slender-stalked, 

 linear-cylindric, 1-5 cm. long, 6 mm. in diameter, mostly staminate at the summit; 



