North American Cyperacca. 315 
i 
him in a pond at Tewksbury, Massachusetts?, which may belong to this 
species; but Link's description will apply almost equally well to E. 
mutata and E. media. 
5. E. BiEOTHRTON, Schult. matit. 2. p. 92. 
This is founded on Scirpus, no. 7, Muhl, gram. p. 29, which is the 
iS. tuberculosus, Michx. and the description is copied without alteratiorj 
from Muhlenberg. 
6. E. MuHLENBERGiANA, Schult. Tiiant. 2. p. 74. 
This very imperfectly characterized sjiecies is the Scirjms {anon.) no. 
4, Muhl. gram. p. 28. I did not find specimens of the plant when I 
examined the Muhlenbergian herbarium. 
7. E. ACUMINATA, N. ob Esenh.in Linntea. 9. p. 294. 
Nees does not describe this species in the work here quoted, but as he 
quotes as a synonym " Scirpus, MuM." he probably refers to S.acumi- 
natus, Muhl. gram. p. 27. Muhlenberg's description of the i>lant is very 
brief and imperfect, and I could find no specimens to correspond with i| 
in his herbarium. 
Among my undetermined Cyperaceae, is a species of Eleq-j- 
chads from the Southern States, which I have never been able 
to obtain with mature fruit. It grows in shallow water, and is 
not uncommon in North and South Carolina, Georgia and 
Florida. The culm is filiform, 4—^12 inches in length, com- 
pressed and sulcate. The spike is ovate, and compressed, but 
instead of producing flowers, it throws out a tuft of long fili- 
form peduncles, or rather culms, one from the axil of each scale, 
which strike root into the mud, or float on the surface of the 
water, and likewise bear proliferous spikes.* In these charac- 
ters the plant resembles E. microcarpa and Chcstocypcrus 
Baldwinii. It differs from the latter in the spike, which, 
though compressed, is not distichous ; and from the former in 
its obtuse and more membranaceous scales. In some of the 
spikelets I observed immature flowers, in which there were 
several retrorsely scabrous bristles, three stamens, and a 3-cleft 
* See Cxray's Elements of Botany, page 250, 
