North Americcm Cyperacece. 429 
Obs. This plant was incorrectly referred by R. Brown to 
C. JiUfoUa of Nuttall, a species which has only been found on 
the banks of the Missouri. Prof. Dewey, who mistook another 
species for the C.filifoUa of R. Brown, has recently described 
the present plant under the name of Kohresia globuluris. It 
is somewhat strange that it should be placed in the latter genus, 
since, although the perigynium is unusually thin and mem- 
branaceous, the plant only differs from Carex in the presence 
of a seta, which Prof. Dewey happened not to observe. As 
the most accomplished botanists now include in U ncinia species 
with a straight and an included seta, it seems advisable to re- 
move this plant to that genus. 
