370 North American Cyperacecc. 
might possibly be referred to Cephaloschoenus, with some mo- 
dification of the generic character; but the habit of several spe- 
cies of that genus is very different from our plants. Since the 
publication of that paper, we have received the Uebersicht der 
Cyperaceengattuvgen of Nees ab Esenbeck, published in the 9th 
volume of the Linnaea, and are surprised to find that the com- 
mon Schoenus cornicidatus of Lamarck appears not to have 
come under his observation. He has, however, established 
the genus Ceratoschoenus upon a new plant (the country it in- 
habits is not mentioned), which, although differing in some re- 
spects, exhibits a striking accordance with these plants. It has 
therefore been thought proper to modify the character of Cera- 
toschoenus, N. ab. E.* so as to include our two species, rather 
than to propose a new genus for their reception, especially as it 
is not unlikely that the species comprised in Cephaloschoenus and 
Ceratoschoenus, with our two species, will ultimately be referred 
to a single genus. Nees having already employed the specific 
name cornicidatus, that of our Rliynchosjjora corniculata (Schoe- 
nus corniculatus, Lamarck) must be changed: we therefore 
adopt that of Michaux, which has the priority over that of Vahl. 
The attenuated beak of the fruit in these plants is formed 
by the induration of nearly the whole style : it is not, however, 
incurved as in C. corniculatus, N. ab E. In our species the 
lowest flower is perfect, the inferior scales being wholly empty : 
in C. longirostris each spikelet is terminated by 3 or 4 stami- 
nate flowers, while in C. macrosiachys only a single abortive 
staminate flower is usually found. 
Should future examination prove our species to be wholly 
distinct from Ceratoschoenus as originally established, the name 
LoNCHOSTYLis might be appUed to them. 
* Ceratoschcenus, N. ah E. Spiculse hermaphroditre, basL apice- 
que steriles. Stylus simplex. Perigynii squamae quinque, cartilagineas, 
angustge, fructui appress?e, basi connatcE. Caryopsis compressa, basi 
styli articulo inserta, prsclonga, incurvaque coronata. — JJehei\ Cijperac, 
in Linncea, 9. p. 296. 
