North American Cyperacect. 421 



out valued correspondent, Dr. Short, we find several devia- 

 tions from the form described by Prof. Dewey, which seem 

 to require a notice. In a hundred specimens, about thirty 

 or forty hav^e the terminal spike androgynous, the pistillate 

 flowers occupying the summit ; and, in some specimens, more 

 than half of the spike is pistilliferous. In other cases, the 

 staminate spike is incoiispicuous, or even reduced to a mere 

 rudiment, and the fertile spikes are smaller and shorter, so as 

 to be ovate or subglobose^ Specimens of this latter form 

 occur among the plants collected in Texas by the late Mr. 

 Drummond (Texan collection. III. no. 432,) in which there 

 is even no vestige of a staminate spike. 



135. C. RETRORSA, ScJiw. anal. tab. I. c; Schw. Sf J'orri.f 

 car. I. c. p. 366. t. 2S. f. 2. 



C. reversa, Spreng. syst. 3. p. 827. 



HABi Northern States and British America ! ; west to the 

 Rocky Mountains ! 



136. C. OLIGOSPERMA, Mivhx. ! fl. 2. p. 174i 

 C. Oakesiana, Dewey ! car. I. c. 14. p. 251, 



Hab. Massachusetts ! and British America ! 



137. C. MiLiARis, Mlchx. '. fl. 2. p. 174. 



Hab. Canada, near Lake Mistassins, Michaux. — This 

 species seems not to have been met with since the time of 

 Michaux. 



138. C. BULLATA, Schkuhr, car. f. 166 ; Willd. sp. 4;' 

 p. 309. 



C. cylindrica, Schw. ! anal. tab. I. c. 

 Hab. Canada and Northern States -' 



