» SEDGE FAMILY 117 



28. Albae. 

 Represented by one species in our range. 90. C. eburnea. 



29. BiCOLORES. 



jSIature perigj-nia wliitish, ellipsoid, not fleshy or translucent. 91. C. Hassei. 

 INIature perigynia orange or brownish, broader, fleshy, translucent. 



92. C. aurea. 

 30. Paniceae. 



Beak of the perigynia none or very short. 



Sheaths of the bracts short; plant glaucous; leaf-blades involute; spikes appro.ximate. 



96. C. livida. 

 Sheaths of the bracts long; plant not glaucous; leaf-blades flat; spikes distant. 



Fertile culm-blades 3-5, 2-3.5 mm. wide; perigynia 3.5 mm. long or less; spikes 



linear. 94. C. tclanica. 



Fertile culm-blades 6-10, 3-7 mm. wide; perigj-nia longer; spikes oblong or linear- 

 oblong. 95. C. Meadii. 

 Beak of the perigynia straight, prominent. 96. C. rayinata. 



31. L^VXIFLORAE. 



Represented by one species in our range. 97. C. blanda. 



32. Granul.\kes. 

 Plants cespitose; bracts elongate, overtopping the spikes; staniinate spike short-stalked. 



98. C. Shrheri. 

 Plants with long-creeping rootstocks; bracts short, rarely overtopping the spikes; stani- 

 inate spike long-stalked. 99. C. Crawei. 



33. Debiles. 

 Represented bj one species in our range. 100. C. Assiniboinensis. 



34. CAPILL.ARES. 



Represented by one species in our range. 101. C. capillaris. 



35. LONGIROSTRES. 



Represented by one species in our range. 102. C. Sprengelii. 



36. Frigidae. 

 Terminal spike staniinate or gjniaecandrous, the lateral ones pistillate. 



Terminal spike usually gynaecandrous, the lateral ones ovoid or short-oblong. 



103. C. misandra. 

 Terminal spike staniinate (or with a few perigj-nia) , the lateral ones oblong or linear- 

 cylindric. 

 Perigynia triangular, slightly compressed. 104. C. luzulina. 



Perigjaiia strongly compressed. 105. C. lissuricola. 



Terminal spike androgynous, the upper lateral staminate, the lower pistillate. 



Perigjiiia lanceolate, 1.5 mm. wide, tapering to the ape.x; spikes 2-5, usually 4. 



106. C. pelricosa. 

 Perigj-nia oblong-oval, 2.25 mm. wide, abruptly minutely beaked; spikes more 

 numerous. 107. C. Franklinii. 



37. Pallescentes. 

 Represented by one species in our range. 108. C. abbreiiata. 



38. Anom.al.\e. 

 Represented by one species in our range. 109. C. amplifolia. 



39. LlMOS.\E. 



Pistillate sjiikes drooping. 



Plants strongly stoloniferous ; leaf-blades involute, glaucous, 3 mm. wide or less; 



scales little exceeding the perigynia. 110. C. limosa. 

 Plant tufted; leaf-blades flat, not glaucous, wider; scales much e.xceeding the peri- 



gjTiia. 111. c. paupcrcula. 



Pistillate spikes erect. 112. C. Buxbaumii. 



40. Atratae. 



Terminal- spike in some plants pistillate and linear-cylindric or staminate only at apex, 

 in others staminate. 

 Scales not long-pointed, little exceeding the perig>-nia; perigynia flattened, sharp- 

 ^ edged. 113. C Parryana. 



Scales long-pointed, 2-3 times as long as the perigynia; perigj-nia little flattened. 

 ^ . , 114. C. idahoa. 



1 erminal spike staminate or gj-naecandrous, not pistillate and linear-cylindric. 

 Terminal spike staminate. 



Culms few-leaved, strongly aphj-llopodic, purplish tinged at base. 

 Staminate scales obtuse, the midvein nearly or quite obsolete. 



Staniinate scales obovate; pistillate scales with obsolete (or nearly so) 



midvein; perigj-nia nerveless. 115. C. podocarpa. 



Staminate scales linear-lanceolate; pistillate scales with strong midvein; 

 perigj-nia 2-nerved. 116. C. venustula. 



Staminate scales with conspicuous more or less excurrent midvein. 



117. C. spectabilis. 



