44 9. CYPERACEiE. 32. Carex. Pl.end.ph 



d, Splkelets alternate, female in the tipper part. 

 Lower spikelets 3 to 5 together, remote. C. axillaris, 20. 

 Lower spikelet single; hraciecB very long; 



fruit ovate, flattened, 2-cut C. remota. 19. 



Lower spikelet single; 

 fruit dilated at bottom, angular, diverging, stellate. 



C stellulata. 17. 

 Lower spikelet single ; culm rough ; 



fruit round at both ends, diverging C. elongata. 16. 



Lower spikelet single ; 

 fruit not diverging ; spikelets all approximating. 



C. ovalis. 15. 

 Lower spikelet single ; glumes pale ; 

 fruit erect ; spikelets 5 or 6, interrupted .... C. airta. 18. 



3. Spikes of different sexes. 



Glumes obtuse ; spikes sessile ; 

 fruit persisting, ovate, obtuse C. ccespitosa. 23. 



Glumes obtuse ; lower spike peduncled ; 

 fruit persisting, compressed, flat ; apex bent, 

 not nicked , C. rigida. 21. 



Glumes obtuse ; lower spike peduncled ; 

 fruit persisting, elliptical, inflated ; apex 2-cut. C. pulla. 22. 



Glumes acute; 

 fruit deciduous, broad, compressed, acute, green 



C. stricta. 24. 



Glumes acute ; 

 fruit deciduous, slender, blunt, brown C. acuta. 25. 



a. Carices with a simple spike. 



1. Carex dioica. Dioicous carex. 



Spikes oblong, dioicous ; fruit ovate, rather upright, 

 convex, ribbed ; upper edge hispid ; leaves thread shape ; 

 culm smooth ; root stoloniferous. 



Gramen cypcroides spica simplici cassa, Jiaii Syn. ed. 2, 267. The male 

 plant. 



Gramen cyperoides minimura, ranunculi capitulo rotundo, Eaii Syn, 

 425, spic. 15. The female plant. 



Carex dioica, Lin. S. F. 1379. 



Carex Itevis, Hoppe. 



Bogs ; perennial ; May and June. 



Culm not branched, 3-sided, 4< to 10 in. high; leafy at 

 the bottom; leaves smooth, shorter than the culm ; male spike 

 linear, acute, upright, an inch long; female spike shorter. 

 7 



