North American Ci/perace<ff, 389 



11. C KOSEA, Schkuhr, car. 2* p. 15. L 179. 



/3. rctrojlexar 



C. retroflexa, Muhl. in Willd. sp. i. p. 235; SchuJchr, car. f, 140. 

 ? 7. Texensis. 



Hab. a and /3. Throughout the United States and British 

 America ! 7. Texas, T. Driimmond ! 



12. C CEPHALGPHORA, MiiJd. ill Willd. sjj. 4. p. 220 ; 

 Schkuhr, car. f. 133. 



? /5. Spikes 4 — 8, aggregated into an oblong or cylindrical 

 head ; scales muticous. 



C. muricata /?• cep&aloidea, Dewey! car. I. c. 11. p.- 308. 



Hab. Northern and IMiddle States ! ^. abounds in New 

 York and Massachussets ! — The plant here placed with some 

 hesitation as a variety of C. cephalojihora, is apparently inter- 

 mediate between that species and C. sparganioidcs, and is per- 

 haps a distinct species. It certainly is not C. muricata^ 



13. C. muricata, Linn.^ SchJcuhryCar.L 22;' Willd.- 

 sp. 4. p. 234. 



C. Hookeriana, Dewey ! car. I. c. 29. p. 248. 



Hab. Near Boston, B. D. Greene, Esq.! ; Carlton House,. 

 Dr. Itichardson ! — This species is by no means common in- 

 North America, although C. muricata, /3. ccphaloidea (here 

 referred to C. cephalophora) is abundant in the Northern States. 

 C. divtdsa, Good, seems, as remarked by Wahlenberg and 

 Hooker, to be a mere variety of the present species, differing 

 in having its spikelets more remote. C. Hookeriana, Dewey, 

 although a more slender plant, seems not to be a distinct 

 species. 



14. C. SPARGANIOIDES, Mukl. in Willd. up. 4. p. 237 ; 

 Schkuhr, car. f. 142. 



C. Boecii, Spreng. syst. 3. p. 812. 



