SEDGE FAMILY 47 



33. Debugs. 

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



34. Capillabes. 

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



35. LONGIKOSTKES. 

 Represented by cue species iu our range. 102. C. Sprengelii. 



36. Fhigidae. 

 Terminal spike staminate or gynaecandrous, tlie lateral ones pistillate. 



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



103. C. misandra. 

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

 cylindric. 

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



Perigynia strongly compressed. 105. C. fissuHcola. 



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



Perigynia lanceolate, 1.5 mm. wide, tapering to the apex; spikes 2-5, usually 4. 



106. C. petricosa. 

 Perigynia 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. Anomalae. 

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



39. LIMOSAB. 

 Pistillate spikes 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 exceeding the peri- 

 gynia. 111. C paupercula. 

 Pistillate spikes erect. 112. C. Buxbaumii. 



40. Atkatae. 



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

 in others staminate. 

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

 edged. 113. C Parryana. 

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



114. C. idahoa. 

 Terminal spike staminate or gynaecandrous, not pistillate and llnear-cylindric. 

 Terminal spike staminate. 



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

 Staminate scales obtuse, the midvein nearly or quite obsolete. 



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



midvein; perigyiiia nerveless. 115. C. podocarpa. 



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

 perigynia 2-nerved. 116. C. venustula. 



Staminate scales with conspicuous more or less excurrent midvein. 



117. C. spectabilis. 

 Culms many-leaved, clothed at base with dried-up leaves of previous year, not 

 purplish tinged at base. 

 Perigynia flat. 118. C. Tolmiei. 



Perigynia round in cross-section, many-nerved. 119. C. Baynoldsii. 



Terminal spike gynaecandrous. 



Perigynia triangular in cross-section, nerveless or nearly so, 2.5 nam. long or less. 



120. C. Halleri. 

 Perigjmla longer, many-nerved or with two prominent marginal nerves, more or 

 less strongly flattened. 

 Spikes contiguous, sessile or short-peduncled, forming a dense head; culms 

 stiff, erect. 

 Perigynia subinflated-trlangular, scarcely compressed, the beak 1 mm. 



long. 121. C. Nelsonii. 



Perigynia strongly compressed, the beak 0.5 mm. long. 



Lowest spike slightly separate, short-peduncled; scales black, with 

 very conspicuous white hyaline apex and upper margins. 



122. C. aloo-nigra. 

 Spikes closely contiguous and sessile; scales black with inconspicuous 

 hyaline apex and margins. 123. C. nova. 



Lowest spike (or spikes) strongly ijeduncled, usually distant, erect or nodding. 

 Spikes 3-5, not oblong-cylindrii;; waUs of the perigynia not papery; peri- 

 gynia 2.5-4.5 mm. long, nerveless or obscurely nerved on the facb, 

 dull green to brownish black; scales from a little shorter to a little 

 longer than the perigynia. 

 Perigynia slightly inflated and sub-triangular, not strongly compressed. 



124. C. atrosquama. 

 Perigynia strongly compressed. 



Perigynia .sharp-edged, the margins much narrower than the achene; 

 lateral spikes linear. 

 Scales shining, with the midvein conspicuous the whole length, 

 exceeded by the perigynia. 125. C. bella. 



