Zostera ZOSTERACEAE— ALISMACEAE Sagittaria 



ZOSTERACEAE 



Zostera L. 

 yZ. marina L. Eel Grass. 



Normally frequent in shallow coastal waters, but more or less 

 periodically disappearing, as a result of the attacks of a parasite. 



SCHEUCHZERIACEAE 



Triglochin L. Arrow Grass. 

 j^T. striata R. & P. 



Rare; in salt marshes near the coast: below mouth of Indian 

 River (S), Commons, 10 Sept. 1875 (A); Ocean City (Wo), Canby, 

 23 July 1893 (D); Greenbackville (Wo), Shreve, 1117 (U). 



A southern plant, here at or near its northern limit. 



^T. maritima L. 



Rare, in coastal salt marshes: "Lewiston, Del." (Lewes (S)), 

 Nuttall, without date, probably 1809 (A). 



A northern species, here at about the southern limit of its range. 



NAJADACEAE 



Najas L. 

 N. flexilis (Willd.) R. &. K. 



One collection: Red Point, Northeast River (Ce), Otis, 9 Aug. 

 1912 (A, D). 



^N. guadalupensis (Spreng.) Morong. 



Infrequent; in fresh or brackish coastal waters, and in ponds of 

 the Coastal Plain. 



N. gracillima (A. Br.) Magnus. 



Infrequent in ponds and streams of Sussex County; rare farther 

 north: in Smyrna River, Smyrna (NC), Van Pelt & Long, 14 

 Aug. 1908 (A). 



ALISMACEAE (Water-plantain Family) 

 Sagittaria L. Arrow-head. 



S. longirostra (Micheh) J. G. Sm. 



Infrequent; in ditches and springheads, in or near the Piedmont. 

 Frt. Sept. 



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