324 CYPERACE. | CyPERUS. 
Spikes at least 
some pedun- 
. cled . . 12, C. exaltatus. 
Wings of rachilla 
deciduous. 13. C. digitatus. 
(6) Spikelets 3-8 in short 
spikes. 
Stem at base nodo- 
sely thickened, 
spikelets usually 
dark colored . 14. C. rotundus. 
Stem at base not 
nodose, spikelets 
usually pale 
yellowish-brown. 15. C. esculentus. 
Rachis of the spikes scab- 
rid pilose . : . 16. C. pilosus. 
2. Spikelets 4 in. long ind 
over. 
Spikelets numerous in 
elongated spikes. 
Spikelets 54-4 in. 
broad, glumes dis- 
tinctly overlapping. 
Rachilla not winged, 
spikelets rather 
remote ‘ . 17. C. procerus. 
Rachilla winged, 
spikelets crowded 18. C. tegetum. 
Spikelets very slender, 
glumes ;; in. long, 
not or only slightly 
overlapping . . 19. C. distans. 
C 
Spikelets 3-8 in. short 
spikes : ( . 14. C. rotundus. 
Bracts of the inflorescence half 
as long as the rays or less . 20. C. corymtosus. 
inflorescence congested rays if pre- 
sent short. (See also C. rotun- 
dus) . : . “ Bey} PY oS bulbosus. 
