North American Cyperacecs. 315 



kim 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. Bjeothrton, Schult. mant. 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 alteration 

 from Muhlenberg. 



6. E. MuHLENBERGiANA, Schult. mant. 2. p. 74. 



This very imperfectly characterized species is the Scirpus {ation.) no. 

 4, Mulil. gram. p. 28. I did not find specimens of the plant when I 

 examined the Muhlenbergian herbarium. 



7. E. ACUMINATA, N. ah Esenh.in Linn(Ea. 9. p. 294. 



Nees does not describe this species in the work here quoted, but as he 

 quotes as a synonym " Scirpus, Muhl.''' he probably refers to S.acumi- 

 nattts, Muhl. gram. p. 27. Muhlenberg's description of the plant is very 

 brief and imperfect, and I could find no specimens to correspond with it 

 in his herbarium. 



Among my imdetermined Cyperaceae, is a species of Eleo- 

 charis 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 Chcetoajpcrus 

 Baldwinii. It differs from the latter in the spike, which, 

 though compressed, is not distichous ; and fram 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 Gray's Elements of Botany, page 250. 



