I 34 POACEAE 



2. S. cynosuroides (L.) Roth (S. polystachya Ell. and of many 



local floras). In salt and brackish marshes: Conn, to Fla. 

 and Miss. 



Common along the whole coast and almost wholly maritime, but 

 at Yonkers-on-Hudson. 



3. S. patens (Ait.) Muhl. On salt meadows, and on beaches: 



Newf. to Que., Fla. and Tex. 



Common along the whole coast: wholly maritime. 



4. S. stricta (Ait.) Roth. (S. alternijolia Loisel). Along the coast: 



Me. to Fla. and Tex. 



Common along the whole coast in some of its forms and almost 

 wholly maritime, but inland at White Plains, Westchester Co., N. Y. 



51. Gymnopogon Beauv. 



Spikes bearing spikelets their whole length; awn longer than flowering 



scale. I- G. ambiguus. 



Spikes bearing spikelets above the middle; awn shorter than flowering 



scale. 2. G. brevifolius. 



1. G. ambiguus (Michx.) B. S. P. In dry sandy soil: southern 



N. J. to Kan., south to Fla. and Tex. 



N. J. Not uncommon from Ocean Co. southward, along the Dela- 

 ware to Cape May, rare or only introduced in the pine-barrens. 



Tertiary, o, or only introduced: Cretaceous, scattered southward: 

 Older Formations, o: 168-220 days. About sea level. 



2. G. brevifolius Trin. In dry soil: N. J. to Fla., west to Miss. 



Known only from near Swedesboro, Gloucester Co., and Bennett, 

 Cape May Co., N. J.; very rare. 



52. Atheropogon Muhl. 

 1. A. curtipendulus (Michx.) Fourn. In dry soil: Conn, to N. 

 Dak. and Wyoming, south to N. J., Tenn., Miss, and Mex. 

 Conn. Rare in Fairfield and Litchfield counties, unknown else- 

 where. 

 N. J. Warren and Sussex Co., not uncommon; also at Mickleton, 



Gloucester Co. 

 Pa. Chester and Northampton Co. 



Tertiary, o: Cretaceous, very rare: Older Formations, scattered, 

 predominating on limestone. 138-207 days. Sea level-1,080 ft. 



