1889.] NEW YORK ACADEMY OF SCIENCES. 13 



Muller's No. 1989 from Orizaba, and Bourgeau's No. 432 from 

 Pedregal, near Mexico, appear to be the same. 



Cyperus l^vigatus, L., has recently been collected in South 

 Carolina by Mr. Gerald McCarthy — the first evidence we have 

 had of its occurrence on the east coast. 



SciRPUS ATROVIRENS, Muhl. var. PALLiDUS, n. var. 



Whole plant pale, including the inflorescence, which is com- 

 posed of larger heads than in the type, and is more contracted; 

 glumes more squarrose. A well-marked variety, but I am so far 

 unable to detect further differences. The achenium is exactly 

 like that of the eastern plant. Indian Territory (E. Palmer, 

 No. 358, 1868); Mitchell Co., Kansas (M. A. Carleton, 1886); 

 Hitchcock Co., Neb. (H. J. Webber, 1888). 



ScHGENUS NIGRICANS, L., wliicli wc have had as North Ameri- 

 can from Florida only, comes now from the San Bernardino 

 Mountains, southern California, where it was collected in 

 June, 1887, by Mr. S. B. Parish (No. 2058). 



HoMALOCENCHRUS, Mieg. Hall. Stirp. Helv. ii. 201 (1768), 

 plainly antedates Leersia, Sw. Nov. Gen. et Sp. PL 21 (1788),. 

 — which is one reason why the latter should not be used, while 

 another is that Leersia, Hedw. Fund. Muse. ii. 88 (1782) 

 {Encalypta, Schreb.), a genus of Musci, is also older, con- 

 taining those mosses which have recently been referred back 

 to Leersia (Braithwaite, British Moss Flora, i. 279). 

 Our northern species must receive binomials as follows: 



HoMALOCENCHRUS ORYZOIDES (L.), Poll. Enum. PI, Palat. 

 (1776) = Leersia oryzoides, Sw. 



HoMALOCENCHRUS ViRGiNicA {W\l\d.)=:Leersia Virginica, 

 Willd. Sp. Plant, i. 325 (1797). 



Panicum nitidum, Lam. var. pauciflorum (Vasey). 



P. dicliotoynwn, var. pauciflorum, Vasey in Columbia College 



Herbarium. 



This is a very slender, smooth grass, with a simple panicle of . 

 five to ten divaricate branches, and these again very sparingly 

 divided and filiform, the whole number of flowers on any single 

 panicle not exceeding twenty. The flowers are larger than in 

 ordinary forms of either dichotomum or nitidtmi, the stem- 

 leaves linear, acuminate, distant, about 5 cm. long, the radical 

 short and ovate. 



Collected by myself on a mountain east of Lake Hopatcong, 

 JVIorris Co., New Jersey, July, 1884. 



