44 
9. CYPERACEiE. 32. Carex. Pl.end.ph. 
d. Spikelets alternate , female in the upper part . 
Lower spikelets 3 to 5 together, remote. C. axillaris . 20. 
Lower spikelet single ; bractece 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, curt a. 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 threadshape; 
culm smooth ; root stoloniferous. 
Gramen cyperoides spica simplici cassa, Raii Syn. ed. 2, 261. The male 
plant. 
Gramen cyperoides minimum, ranunculi capitulo rotundo, Raii Syn. 
425, spic. 15. The female plant. 
Carex dioica, Lin. S. F. 1379. 
Carex laevis, 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. 
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