Genus 18. 



SEDGE FAMILY. 



393 



98. Carex deflexa Hornem. Northern Sedge. 

 Fig. 965. 



Carex deflexa Hornem. Plantel. Ed. 3, 1 : 938. 1821. 



C. deflexa var. Deanei Bailey, Mem. Torr. Club 1 : 42. 1889. 



Rootstocks slender, loosely branched and short- 

 stoloniferous, culms filiform, erect or spreading, i'-i2' 

 long, shorter than or little exceeding the narrow bright 



freen leaves. Bracts subulate or very narrowly linear, 

 '-2' long; staminate spike sessile, i"-3" long, incon- 

 spicuous; pistillate. spikes 1-3, i"-2j" long, subglobose, 

 2-8-flowered, all sessile and closely contiguous or the 

 lower somewhat separated, usually also 1 or 2 nearly 

 basal filiform-stalked spikes from the lowest sheaths; 

 perigynia oblong-obovoid, much narrowed at the base, 

 short-pubescent, 1" or less long, tipped with a flat, 

 slightly 2-toothed beak about one-fourth the length of 

 the body; scales ovate or ovate-lanceolate, acute or cus- 

 pidate ; stigmas 3. 



In open places, Greenland to Alaska, south to Massachu- 

 setts, Pennsylvania and Minnesota, mostly at high altitudes. 

 Summer. 



99. Carex Rossii Boott. Ross's Sedge. 

 Fig. 966. 



C. Rossii Boott ; Hook. Fl. Bor. Am. 2 : 222. 1840. 

 Carex deflexa var. media Bailey, Mem. Torr. Club 



1 : 43. 1889. Not C. media R. Br. 1823. 

 C. deflexa Farwellii Britton ; Brit. & Br. 111. Fl. 1 : 



334. 1896. 

 C. Farwellii Mackenzie, Bull. Torr. Club 37 : 244. 



1910. 



Rootstocks slender, loosely branched and stolo- 

 niferous; culms slender, erect, 8'-is' long, shorter 

 than or little exceeding the leaves. Leaves about 

 i' wide; lowest bract conspicuous, often exceed- 

 ing inflorescence ; staminate spike sessile or nearly 

 so, 3"-6" long, conspicuous ; pistillate spikes 2-3, 

 2j"-4" long, short-oblong, 3-10-flowered, sessile 

 or short-peduncled, approximate or the lower 

 separate, filiform-stalked; basal spikes conspicu- 

 ous; perigynia oblong-obovoid, much narrowed at 

 base, short-pubescent, 2" long, abruptly contracted 

 into a bidentate beak from one-half length to 

 nearly as long as the body; scales ovate, obtusish 

 to short-cuspidate; stigmas 3. 



Dry soil, Michigan to British Columbia, Oregon, 

 and south in the Rocky Mountains. June-July. 



100. Carex nigro-marginata Schwein. Black- 

 edged Sedge. Fig. 967. 



C. nigro-marginata Schwein. Ann. Lye. N. Y. i : 68. 1824. 



Bright green, stoloniferous, culms filiform, wiry, 

 aphyllopodic, erect or spreading, 2'-8' long, very un- 

 equal in length. Leaves i"-2" wide, very much longer 

 than the culms, rather stiff, often 12' or more long; 

 bracts very short and subulate or wanting; staminate 

 spike sessile, inconspicuous, 2"-^" long; pistillate spikes 

 1-3, few-flowered, sessile at the base of the staminate, 

 about 3" long; perigynia if" long, short-pubescent or 

 nearly glabrous, the body oval, i" thick, stipitate, 

 i-ribbed on two sides, tipped with a cylindric-subulate 

 2-toothed beak one-third to one-half as long as the 

 body ; scales ovate, acute or cuspidate, green with purple 

 margins or variegated, rather longer than the perigynia. 



Dry soil, Connecticut to South Carolina. April-July. 



Carex floridana Schwein., distinguished by its light-colored scales, occurs from Virginia to 

 Florida and Texas. 



