North American Cyperacea. 421 
our valuod correspondent, Dr. Short, we find several devia- 
tiono 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 pistiiliferous. In other cases, the 
staminate spike is inconspicuous, 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, Schiv. aricil. tab. I. c; Schw. Sf TorrJ 
car. I. c. p. 366. t. 2S. f. 2. 
C. reversa, Spreng. syst. 3. p. 827. 
Hab. Northern States and British America ! ; west to the 
Rocky Mountains! 
136. C OLIGOSPERMA, MicJix. •' Jl. 2. p. 174. 
C. Oakesiana, Dewey ! car. I. c. l4. p. 251, 
Hab. IMassachusetts ! and British America ! 
137. C. MiLiARis, Michx. ! jl. 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, Schlcukr, car. f. 166 ; Willd. sj). 4<' 
p. 309. 
C. cylindrica, Schiv. ! anal. tab. I. c. 
Hab. Canada and Northern States ! 
