POACEAE 109 



In our area known only from the drainage area of the Delaware 

 River, from Hunterdon Co., N. J., and Northampton Co., Pa., 

 southward; and at Cape May; not in the pine-barrens. 



12. P. agrostoides Spreng. Wet ground: Me. to Minn., south to 



Fla. and Tex. 



Throughout the range except at Cape May and east of the pine- 

 barrens. 



13. P. condensum Nash. Wet places and along streams: southern 



N.J. and Pa. to Fla. and Tex. ; also in the Bahamas, Cuba and 

 Guadeloupe. 



Known only from the southern part of Cape May Co., N. J. 



14. P. longifolium Torr. In moist soil: R. I. to Md., Fla., Miss. 



and Tex. 



Conn. Rare along the coast at Groton, Montville and Fairfield. 

 N. Y. On L. I. and S. I. and in the Bronx, unknown northward. 

 N. J. Rare in Bergen and northern Middlesex counties, increasing 



southward, especially in the pine-barrens. 

 Pa. Philadelphia Co. 



Tertiary, common: Cretaceous, common: Older Formations, rare 

 and scattered. 179-220 days. About sea level. 



15. P. stipitatum Nash. In moist soil: Conn, and N. J. to Ky., 



Mo., Ga. and Tex. 



Conn. Rare at Lyme, unknown elsewhere. 



N. Y. Bronx Park, N. Y. City; and near Kingsbridge. 



N. J. Rare in Passaic, Bergen, and Middlesex counties, increasing 

 southwestward and becoming frequent in the counties bordering 

 the Delaware; not in the pine-barrens nor south of them. 



Pa. Northampton, Philadelphia and Chester counties. 



Tertiary, o: Cretaceous, frequent; Older Formations, scattered. 



159-220 days. About sea level. 



16. P. depauperatum Muhl. In dry places: Me. to Minn., south 



to Ga. and Tex. 



Throughout the range, except the pine-barrens, there less common 

 and perhaps adventive. 



17. P. linearifolium Scribn. In dry soil: N. S. to Mich., south 



to Ga., Ark. and Tex. 



Conn. Throughout. 



N. Y. On L. I. and S. I., increasing northward. 



