SEDGE FAMILY 117 



28. Albae. 

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



29. BiCOLORES. 



Mature perigynia whitish, ellipsoid, not fleshy or translucent. 91. C. Ilassei. 

 IMature perigynia orange or brownish, broader, fleshy, transhicent. 



92. C. aurea. 



30. PanICEAE. 



Beak of the perig^iiia none or very short. 



Sheaths of the bracts short; plant glaucous; leaf-blades involute; spikes approximate, 



93. C. Htida. 

 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 Ictanica. 



Fertile ciilm-blades 6-10, 3-7 mm. wide; perigynia longer; spikes oblong or linear- 

 oblong. 95. C. Meadh. 

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



31. L.VXTFLORAE. 



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



32. GR.\NUL.\RE3. 



Plants cespltose; bracts elongate, overtopping the spikes; staminate spike short-stalked. 



98. C. ShriverU 

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



inate spike long-stalked. 



33. Debile-S. 



99. C. Crawei. 



Represented b> one species in our range. 100. C Assiniboinensis. 



34. CaPILLARES. 



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



35. LOXGIROSTRES. 



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



36. Frigidae. 



Terminal spike staminate or g>'naecandrous, the lateral ones pistillate. 



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



103. C. misandra. 



Terminal spike staminate (or with a few perigjTiia), the lateral ones oblong or linear- 



cylindric. 

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



Perigynia strongly compressed. 105. C. fissuricola. 



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



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



106. C. petricosa. 

 Perlgj-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. abbreviata. 



38. AnomaL-VE. 

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



39. LlMOS,\E. 



Pistillate spikes drooping. . , , 



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



scales little exceeding the perig>Tiia. 110. C. limosa. 



Plant tufted; leaf-blades flat, not glaucous, wider; scales much exceeding the peri- 



gjTiia \1\' C. paupercula. 



PistiUate spikes erect. 112. C. Buxbaumii. 



40. Atrat.ye. 



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



in others staminate. , . . . „ ^, , • 



Scales not long-pointed, little exceeding the perigjiua; perigyma flattened, sharp- 

 edggfi 113. C Parry ana. 



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



114. C. idahoa. 



Terminal spike staminate or gj-naecandrous. not pistiUate and linear-cylindric. 



Terminal spike staminate. ,. ^ ^. ■, ^ ^u 



Culms few-leaved, strongly aphjilopodic, purplish tinged at base. 

 Staminate scales obtuse, the midvein nearly or quite obsolete. 



Staminate scales obovate; pistiUate scales with obsolete (or nearly so) 



midvein; perigvnia nerveless. 115. C. podocarpa. 



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

 perigynia 2-nerved. 116. C.tenustula, 



Staminate scales with conspicuous more or less excurrent madvem. 



117. C. spectabilis. 



