74 FLORA OF PRILABULPU1A. 



18. -GKISEAE. 



Leaves slightly glaucous or not. at ,all. , 



Pistillate . spikes dense, usually many-flowered; leaves 4-6 mm. wide, 



spreading, soft. 49. C. grisea. 



Pistillate ■ spikes loosely several-flowered.; leaves 2-4 mm. wide, mostly 

 erect and rigid, , . 50. C. amphibpla. 



Plant very glaucous all over. 51. C. glaucqdea. 



19. GRANULARE8. 



Perigynia 2-3 mm. long. 52. C. granulans. 



Perigynia 1-1.5 mm. long. 53. C. Skrweri. 



20. EXTEN8AE. 



54. H. flava. 



21. PALLESCENTES. v 



55. C. pallescens. .1 



22. OLIGOCARPAE. 



Sheaths glabrous. ,,.,,,. 



Perigynia narrowed at both ends, beakless. 56. C. conoidea. 



Perigynia with a short entire beak. 57. C. oligocarpa. 



Sheaths pubescenti 58. C. Hitchcockiana. 



23. LAXIELOBAE. 



Plants not at all glaucous, or very slightly so. 



Beak -of the perigynium straight, slender. 59. C. polymorphs. 



Beak of the perigyriium'bentj short or none. 

 Leaves mostly narrow,, 2-12 mm. .wide.. 

 Scales, at least the upper, obtuse. 



Bracts elongated ; , spikes loosely flowered ; culms slender. 



' .' ' .60. C tetanica. 



Bracts short; spikes densely flowered; culms stout. 



61. C. Meadii. 

 Scales acute, cuspidate, acuminate, or awned. 

 Perigynia obtusely 3~angled. 



Perigynia obovoid, 2.5-3 mm. long. 



.:■.•: :.-..■; * 62, C. laxiflora. 



Perigynia oblong, narrow, about 4 mm. long. 



Perigynia narrowly oblong, 4-5 mm. long, the 



beak oblique. 63. C. stylofiexa. 



Perigynia elliptic, 3-4 'mm. long, the beak nearly 

 straight. 64. C. striatula. 



Perigynia sharply 3-angled. 65. C. digitalis. 



Leaves broad, 12-36 mm. wide. 



Bracts leafy, the upper usually overtopping the spikes. 



66. C. AVbwsina. 

 Bracts mostly reduced to purple, leafless sheaths. 



67. C. plantaginea. 

 Plants distinctly glaucous. 



Pistillate spikes drooping on hair-like stalks. 68. C. laxiculmis. 

 Pistillate spikes erect,; ■ 



Basal leaves much longer than the culm. 69. C. ptyehocarpa. 

 Basal leaves i shorter than the culm or equalling it. 



Leaves 12-25 mm. wide. 70. C. platyphylla. 



Leaves 2-4 mm. wide. 71. C. livida. 



24. DIGITATAE. 



72. C. setifolia. 



