POACEAE 143 



5. P. nervata (YVilld.) Kuntze. In wet places: Newf. to Br. Col., 



south to Fla. and Mex. 



Throughout the range, rare in the pine-barrens, increasing and 

 common northward. 



6. P. grandis (S. Wats.) Nash {P. americana MacM.). In wet 



soil: N. S. to xA.lask., south to Pa., Colo, and Nev. 



Conn. Rare along the coast, increasing northward. 



N. Y. Rare on L. I., not recorded from S. I., thence increasing and 



common northward. 

 N. J. Rare in Camden Co. (not recently collected): in Sussex and 



Essex counties. 

 Pa. Monroe, Northampton, Bucks and Schuykill counties. 



Tertiary, o: Cretaceous, very rare and perhaps not now present: 

 Older Formations, increasing northward. 



7. P. pallida (Torr.) Kuntze. In shallow water: N. S. and N. B. 



to Minn., south to N. Car. and Tenn. 

 Common throughout the range. 



8. P. septentrionalis (Hitchc.) Bicknell. (P '. fluitans of some local 



floras, not of R. Br.). In water: Vt. and Que. to Br. Col., 



south to N. Car., La. and Tex. 



Conn. Rare and local in New London, Windham, New Haven and 



Litchfield counties. 

 N. Y. In the Bronx and Westchester counties and on S. I. 

 N. J. Throughout the state north of the coastal plain; not in 



the pine-barrens, but at Cape May.* 

 Pa. Chester Co. northward. 



A scattered and rather local species. 



9. P. borealis Nash. In shallow water: Newf. to Alask., south 



to N. Y. and Minn., Iowa, and Ore., and in the mountains to 



Colo. 



Conn. In northern Windham, Hartford and Litchfield counties. 



N. Y. Unknown on L. I., rare on S. I., thence increasing northward. 



N. J. Sussex Co. 



Pa. Rare in Pike Co. 



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

 northward. Not south of the moraine. H7-i79days. Sealevel- 

 3,365 ft. 



* See Introduction paragraph 32. 



