SCHEUCHZERIACEAE 85 



ZOSTERACEAE 

 1. Zostera L.* 

 I. Z. marina L. Atlantic coast from Greenland to Fla. ; Pacific 

 coast, Alaska to Calif. 



Throughout the coasts and up the brackish rivers. 



NAIADACEAE 

 1. Naias L.* 



Leaf-sheaths merely rounded, not auriculate; leaves 0.5 mm. wide or 



more. I. N.flexilis. 



Leaf-sheaths auriculate; leaves 0.2 mm. wide or less. 2. N. gracillima. 



1. N. flexilis (Willd.) Rost. & Schmidt. In ponds and streams: 



Quebec to Br. Col., south to Fla. and Tex. 



Conn. Throughout, increasing northwestward, not common. 



N. Y. L. I.; Westchester and Rockland counties. 



N. J. Common in the north, decreasing southward, perhaps 



wanting in the pine-barrens. 

 Pa. Northampton, Bucks, Chester and Delaware counties. 



2. N. gracillima (A. Br.) Magnus. In pools: Mass. to Mo., 



south to N. J. and Pa. 



Conn. New London, Tollund, New Haven and Fairfield coun- 

 ties. 



N. Y. Valley Stream and Rockville Centre, L. I. 



N. J. Woodstown and Palatine, Salem Co., and Spotswood, 

 Middlesex Co. 



Pa. Bristol, Bucks Co. 



SCHEUCHZERIACEAE 



Leaves all basal; flowers numerous on naked scapes, ebracteate, 



spicate or in spike-like racemes. I. Triglochin. 



Stem leafy; flowers few in a loose raceme. 2. Scheuchzeria. 



i. Triglochin L.* 



1. T. maritima L. Lab. to Alaska, south to N. J., western N. Y., 

 Ohio, Wise, Neb., N. Mex., Cal., northern Mex. and Lower 

 Cal. Also in Europe and Asia. 



* See footnote, page 76. 



