214 



CYPERACEAE (SEDGE FAMILY) 



C. Orawei* 



104. C. Uvida, 



105. C.panicea. 



106. C. tetanica. 



108. C. vaginata. 



147. C. venusta, v. mi7ior. 



122. C. Careyana. 



i. Perl^ynla ^anulose-roughened ; spikes very remote, ses- 

 sile or short-stalked, in nearly all the leaf-axils . 

 i. Perigynia not granulose ; spikes (except in rare cases 

 long-stalked basal ones) borne only toward the sum- 

 mit of the culm j. 

 J. Leaves white-glaucous, quickly becoming plicate or 



involute • 



J. Leaves green, slightly if at all glaucous, flat, m age be- 

 coming revolute. 

 Culms obtusely angled, smooth throughout 

 Culms acutely angled, scabrous at summit. 

 Spikes slender-cylindric, 3.6 mm. thick. 

 Spikes mostly close-tiowered, the perigynia over- 

 lapping 



Spikes loosely flowered, most of the perigynia 



remote (106) 0. tetanica, v. Woo4tl. 



Spikes oblong-cyiindric, 6-10 mm. thick . . (106) C. tetanica, v. Meadii. 

 h. Perigynia with a straightish slender beak. 



Culm stiff, harsh above ; spikes stiffly erect, densely many- „ ^ , 



flowered 107. C. polymorpha. 



Culm flexuous, smooth throughout ; spikes spreading or 



drooping, loosely few-flowered 



; Perigynia with numerous uniform nerves from base to orifice (ex- 

 treme specimens of nos. 106, 107, 108 might be sought here) h. 

 h. Tall and slender, with linear-cylindric spikes . . . 

 Ik Low, or if tall with thick-cvlindric to globose spikes I. 



I. Perigynia sharply angled, with plane faces (forms of V. laxi- 



fiora might be sought here) nt. 

 m. Perigynia 5-7 mm. long ; staminate spikes dark brown or 



purplish • • 



m. Perigynia 2-4 mm. long; staminate spike straw-color or 

 pale brown n. 

 n. Basal leaves 1-3 cm. broad ; pistillate spikes sessile and 



erect 123- G- plaPyphylla, 



n. Basal leaves narrower, or, if rarely 1 cm. 6road, the spikes 

 flexuous on capillary peduncles. 

 Scales acuminate or aristate ; lowest bract slightly if at 

 all overtopping the inflorescence. 

 Basal leaves 6-12 mm. broad. . . 



Perigvnia 2.8-3.2 mm. long . . . . . 124. C. lax^culmts. 



Perigynia 3.3-4 mm. long , . . . {\^A) C. laxiculmis, y . copulata.. 

 Basal leaves 2-5 mm. broad ...... 125. C. digitalis. 



Scales blunt; lowest bract greatly overtopping the in- ^ , , 



florescence 126. C. ptychocarpa. 



I. Perigjmia obtusely angled, or plump and scarcely if at all angled o. 

 O. Perigynia strongly ascending, beakless or with broadly 

 conic oblique" tips ; spikes mostly scattered ; bracts 

 strongly ascending p. 

 p. Perigynia fusiform to fusiform-obovoid, tapering sub- 

 equally to the conic tip and the long gradually con- 

 tracted base, obtusely trigonous q. 

 q. Perigynia bearing distinct elevated ribs ; scales smooth T. 

 r. Perigynia with several ribs on each face s. 



S. Staminate spike prominent, usually projecting 

 above the pistillate ; culms slightly if at all 

 ancipital t. 

 t. Pistillate spikes distinct, not closely crowded. 



Perigynia plump-obovoid, the short beak ab- 

 ruptly bent to one side. 

 Pistillate spikes mostly 1.5-3 cm. long . . 127. C. laxiflora. 

 Pistillate spikes mostly 0.5-1.3 cm. long 



(127) C. laxiflora, v. gractlhma. 

 Perigynia ellipsoid-fusiform, the elongate beak 

 slightly oblique. 

 Perigynia appressed-ascending in an alter- 

 nate-flowered spike . . . (127) C, laxiflora, v. patulifolia. 

 Perigynia oblique or divergent, mostly over- 

 lapping in the densish spike. 

 Basal leaves 7-12 mm. broad . (127) C. laxiflora, v. Michauxit. 

 Basal leaves 3-6 mm. wide . . (127) C. laxi/lora, v. styloflexa. 



f. Uppermost pistillate spikes approximate at the 



base of the staminate . . . . (\21) O. laxiflora, v. vartans. 

 S. Staminate spike small and nearly or quite hidden 

 among the pistillate ; culms ancipital. 

 Basal leaves elongate, linear-lanceolate, 5-14 mm. 



broad (127) C. laxiflora, v. blanda. 



Basal leaves lanceolate, 1.5-4 cm. broad . (127) C. laxiflora, v. latifolia. 

 i». Perigynia nerveless or with 1-3 nerves on each face 



(127) C. laxiflora, v. leptonervia 



