POACEAE 99 



9. Nazia Adans. 



1. N. racemosa (L.) Kuntze. Occasional in ballast: E. N. Am. 



Native of Europe and Asia. 

 Rare as a weed in our area. 

 Nazia aliena (Spreng.) Scribn. has been collected as a waif near Yonkers. 



10. Syntherisma Walt. 



Rachis of the racemes wingless; first scale of spikelet wanting or 



rudimentary- '■ S. filiforme. 



Rachis of the racemes with the lateral angles broadly winged. 



Leaves glabrous; first scale wanting the second as long as 



spikelet. 2. 5. Ischaemum. 



Leaves pubescent; first scale present, the second shorter than 



spikelet. 3- S. sanguinale. 



i. S. filiforme (L.) Nash. Dry sandy soil: N. H. to Mich., south 

 to Fla. and Mex. 

 Conn. Throughout. 

 N. Y. Common on L. I. and S. I., decreasing and perhaps wanting 



northward. 

 N. J. Scattered over most of the state, increasing southward. 

 Pa. • Lehigh, Bucks, Philadelphia, Delaware and Chester counties. 



Apparently weedy with us. 



2. S. Ischaemum (Schreb.) Nash (S. humifusum (Pers.) Rydb.). 



In cultivated grounds and waste places: N. S. to S. Dak., 

 south to Fla. and Tex. Naturalized from Europe. 

 Not uncommon as a weed. 



3. S. sanguinale (L.) Dulac. In cultivated or waste places: 



throughout N. Am. Native of Europe. 

 Throughout the range as a weed. 



1 1 . Leptoloma Chase. 

 1. L. cognatum (Schultes) Chase. N. H. to Fla., 111., Minn., 

 and northern Mex. 



Known only from near Riverhead, L. I. and New Haven, Conn. 



12. Paspalum L. 



Wings of the rachis broad, membranous, inrolled on the spikelet. 1. P. dissectum. 

 Wings of the rachis narrow, not membranous, nor inrolled on 

 the spikelet. 

 One to several raceme-bearing naked branches arising from 

 the uppermost leaf-sheath. 



