154 CYPERACEAE 



3. C. rivularis Kunth. In moist places: Me. to Ont. and Mich., 



south to Mo., N. Car. and Mo. 



Conn. Throughout. 



N. Y. Throughout. 



N. J. Rare in Morris Co., wanting thence to the coastal plain, 

 there increasing and common, but not recorded from the pine- 

 barrens. 



Pa. Northampton and Delaware counties. 



4. C. filicinus Vahl. (C. Nuttallii Eddy.) In salt marshes: Me. 



to Miss. 



Common throughout our coastal marshes. 



5. C. microdontus Torr. In wet soil; on or near the coast: 



N. J. to Fla. and Tex. 



Known only from Navesink Highlands and at Cape May, N. J., 

 along the coast and at Pleasant Mills in the pined^arrens ; rare. 



6. C. inflexus Muhl. In wet sandy soil: N. B. to N. W. Terr. 



and Br. Col., south to Fla., Tex., Cal. and Mex. 



Conn. Throughout, but rare. 



N. Y. Rare in Columbia and Greene counties, and also at Van 



Courtlandt Park and Mt. Vernon. 

 N. J. Rare in Hunterdon, Sussex, Warren and Morris counties; 



mostly along the Delaware River. 

 Pa. Northampton, Bucks and Chester counties. 



Tertiary, o: Cretaceous, o: Older Formations, scattered. 128- 

 220 days. Sea level-1,900 ft. 



7. C. compressus L. In fields and waste places: southern N. Y. 



to Mo. and Tex. Also in the Tropics. 

 Rare in our area as a ballast weed. 



8. C. Iria L. In cultivated ground: N. Y. ; N. Car. to Fla. and 



Tex. Native of Asia. 



Localized, so far as known, at Hempstead, L. I. 



9. C. pseudovegetus Steud. In marshes: N. J. to Fla., Ky., 



Mo., Kan. and Tex. 



Known in our area only from Riddleton, Salem Co., N. J., a 

 regionin the Cretaceous area, at about sea level and with a growing 

 season of about 179 days; not recently collected. 



10. C.fuscus L. On ballast: Mass. to N. J. and Md. Native of 

 Europe. 



Rare as a weed. 



