314 North American Cyperarea. 



Vahl is correct or not, can hardly be determined from hi* 

 brief description, but we have no other Eleocharis that so 

 nearly agrees with it. Scirpus nanus, Spreng. syst. 1. p. 20St, 

 (S. parvulus, Rcem. 5f Schidt. 2. p. 124), of which I possess 

 specimens from the author himself, is closely related to our 

 plant, but differs in its terete culm and more obtuse carinate 

 scales. It is, however, a true Eleocharis ; for the tubercle, 

 though extremely minute, can be distinguished with an ordi- 

 nary lens. 



The following species of Eleocharis are omitted for reasons given at 



page 281. 



1. E. GENicuLATA, jR. Browu 1 — Scirj>us geniculatus, Pursh, fl. 1. 

 p. 55, not of Vahl. 



This species, which is a native of Cayenne, Surina.m, and Jamaica, is 

 said by Pursh to inhabit the sea shore of Virginia and Carolina, but it 

 was not known to Muhlenberg, Elliott or Baldwin, neither has it to njy 

 knowledge been found by any other American botanist, and Pursh may 

 have mistaken for it, the E. equisetoides. There is no specimen of it 

 among his plants, now incorporated in the Lambertian Herbarium. 



2. E. ovATA, R. Brownl — Scirpus ovatus, Pursh, not of Vahl. 



Pursh states that he found this species in Pennsylvania, but his speci- 

 mens, named iS. ovatus, in Lambert's Herb, seem to belong to Eleocharis 

 intermedia. The S. ovatus of most other writers on N. American botany 

 is Eleocharis obtusa. 



3. E. GLAUCESCENS, Schult. mant, 2, p. 89.— Scirpus glaucescens, 

 Willd. enum. hort. Berol, 1. p. 76; Roem. & Schult, syst. 2. p. 126. 



Willdenow says he received his S. glaucescens from N. America, but 

 the description which he has given of it is so imperfect, that the plant 

 can only be identified by consulting his herbarium. 



4. E. TORTiLis, Schult mant. 2. p. 92; Scirpus tortilis, Bosc, apud 

 Link, jahrb. 3. p. 78. (fide Schult.) 



North America, Link. 



I have received from my estimable friend, B. D. Greene, Esq. of 

 Boston, specimens of an Eleocharis in an immature state, collected by 



