156 CYPERACEAE 



Known only from Kaign's Point, Camden Co., N. J., there 

 probably adventive. 



18. C. strigosus L. In meadows, swamps or streams: Me. and 



Ont. to Minn., Fla. and Tex. 



Common throughout the range, except the pine-barrens, there 

 unrecorded. 



19. C. refractus Engelm. In dry fields: N. J. to Ga., Mo. and 



Tex. 



Known in our area only from Delaware Co., Pa., and from near 

 Trenton, N. J. 



20. C. retrofractus (L.) Torr. (C. dipsaciformis Fernald). In dry 



sandy soil: N. J. to Fla., west to Ky., Mo. and Tex. 



N. J. Camden, Atlantic and Salem counties; recorded as formerly 

 growing about Hoboken. 



Pa. Philadelphia, Bucks and Chester counties, increasing south- 

 ward. 

 A rare and local species. 



21. C. lancastriensis Porter. In dry fields: N. J. and Pa. to Ga., 



Mo. and Ala. 



N. J. Mercer, Camden and Salem counties along the Delaware and 



at Sea Bright, Monmouth Co. 

 Pa. Tullytown, Bucks Co. and in Philadelphia and Delaware 



counties. 



Tertiary, o: Cretaceous, rare: Older Formations, very local near 

 the " fall line " in Pa., unknown elsewhere. 176-224 days. About 

 sea level. 



22. C. hystricinus Fernald. In dry sandy soil: N. J. and E. Pa. 



to Ga. and Tex. 



N. J. Rare and local in Camden, Gloucester and Atlantic counties. 



Pa. Near Philadelphia. 



A rare and local species whose distribution is not fully known. 



23. C. Torreyi Britton. Sandy pine-barrens and on the seashore: 



southern N. Y. to Fla., west to Mo. and Tex. 



N. Y. On the south side of L. I. and near Tottenville, S. I., 



unknown elsewhere. 

 N. J. Common throughout the coastal plain, except towards the 



" fall line"; unknown elsewhere. Most common on the Beacon 



Hill formation in our area. 



