﻿EUSTACHYS IN NORTH AMERICA 433 



extreme shortness, appear to us to warrant the maintenance of 

 Eustachys as distinct from Chloris. In general appearance the two 



tory 



dence to the technical characters above alluded to. 



In North America, the distribution of the two genera is mark- 

 edly different. Chloris, with the exception of one species, C. bar- 

 bata, does not occur native east of the Mississippi River. This 

 one exception is in southern peninsular Florida and is a West 

 Indian plant which is also found in South America. Eustachys, on 

 the other hand, with one exception, E. petraea, is not indigenous 

 west of the Mississippi, but is mainly confined to the southeastern 

 United States. E. petraea extends as far west as Texas, and 

 much beyond the limits of North America. Chloris appears to be 

 abundant in the southwestern United States and Mexico, and prob- 

 ably southward into South America, while Eustachys, as stated 

 above, is mainly confined, in the United States, to the southeast- 

 ern portion, and is particularly partial to Florida, all four species 

 b emg found in that State, two of them not known outside its bor- 

 ders, and one species, E. Floridana, extending just beyond the line 

 ln to Georgia. The fourth species, E. petraea, as stated, has a 

 wider range, extending from Florida along the Gulf Coast to 

 Texas, and thence through Central America to South America ; 

 also in the West Indies and the Bahamas. 



Descriptions follow of the two genera with the species under 

 tn em and their distribution, so far as known, at the present time. 

 In order that the knowledge of this distribution may be extended 

 and better defined, additional herbarium material would be highly 

 P nz ed, and the hope is expressed that those having such material 

 t0 spare will send it to the author, who will gladly determine it. 



The material, upon which the results obtained in this paper are 



bas ed, is contained in the herbaria of the New York Botanical 



garden, Columbia University, and the Division of Agrostology, at 



Washington, D. C, and also in the author's own private collection. 



e material from the herbarium of the Division of Agrostology. 



' lnd Iy loaned for examination by Prof. Scribner, has been of 



Ls Pecial value and has ereatlv aided us in this revision, as it is par- 

 tial ' * ' 



arly rich in forms 



•ch region the genus Chloris is largely represented. 



untry 



