58 CYPERACEAE 



b. Leaf-blades 12-36 mm. broad. 



Bracts leaf-like, the upper one usually surpassing the inflorescence. 



76. C. Albursina. 

 Bracts mostly reduced to bladeless sheaths. 77. C. piantaginea. 

 B. Plants distinctly glaucous. 



Pistillate spikes drooping from hair-lrke peduncles. 78. C. laxiculmis. 

 Pistillate spikes erect. 



Leaves much longer than the scapes. 79. C. ptychocarpa. 



Leaves shorter than the scapes or about equalling them. 



80. C. piaiyphylla. 



XXV. BICOLORES. 



A single species in our range. 81. C. aurea. 



XXVI. DIGITATAE. 



A single species in our range. 82. C. setifolia. 



XXVII. PEDUNCULATAE. 

 A single species in our range. 83. C. pedunculata. 



XXVIII. MONTANAE. 



Plants not stoloiiiferous. 84. C. pedicellata. 



Plants stoloniferous, the stolons sometimes short. 

 Scapes, or some of them, longer than the leaves. 



Staminate spikes conspicuous, mostly over 6 mm. long. 

 Plant dark green : staminate spike very prominent : perigynia broadly 



oval. 85. C. Pennsylvanica. 



Plant light green : staminate spike shorter : perigynia oblong. 



86. C. varia. 

 Staminate spikes inconspicuous, mostly less than 6 mm. long. 



87. C. deft ex a. 



88. C. albicans. 

 Scapes, or most of them, much shorter than the leaves. 



Scales light green, with purple margins, or these never pale : perigynia 

 oblong. 89. C. nigro-marginala. 



Scales green with lighter scarious margins : perigynia oval. 



90. C. titnbellala. 



XXIX. TRIQUETRAE. 



A single species in our range. 91. C. pubescens. 



XXX. PHYLLOSTACHYAE. 

 Body of the perigynium oblong ; beak flattened. 92. C. IVildenovii. 



Body of the perigynium globose ; beak subulate. 93. C.Jamesii. 



XXXI. LEPTOCEPHALAE. 

 A'single species in our range. 94. C. leptalea. 



XXXII. DIOICAE. 

 A single species in our range. 95. C. Redoivskyana. 



XXXIII. FOETIDAE. 



A single species in our range. 96. C. cho7-dorhiza. 



XXXIV. VULPINAE. 

 Perigynium-beak shorter than the body. 97. C. conjnncta. 

 Perigynium-beak longer than the body or about as long. 



98. C. stipata. 



