Lophotocarpus ALISMACEAE— VALLISNERIAC. Vallisneria 



Lophotocarpus Durand 



L. spongiosus (Engelm.) J. G. Smith. 



Infrequent in ditclies, and tidal mud of Delaware River, in New 

 Castle County, where not recently collected; reported from the 

 shore of Nanticoke River in Wicomico County near Vienna, by F. 

 Shreve, No. 1296 (U). 



Helianthium Engelm. 



H. parvulum (Engelm.) Small. {Echinodorus tenellus of Gray's 

 Manual, ed. 7.) 

 Rare: border of pond, Canterbury (K), Canhy, July 1874 (D). 



Alisma L. 

 A. subcordatum Raf. (A. Plantago-aquatica of Gray's Man,, ed. 7.) 

 Common in ponds and ditches, Piedmont and Coastal Plain. 

 Frt. Aug., Sept. 



VALLISNERIACEAE (Tape-grass Family) 



Anacharis B. & P. Water Weed. 

 A. canadensis (Mx.) Planch. (Elodea canadensis of Gray's Man., 

 ed. 7.) 

 Frequent but seldom collected, in fresh water of streams and 

 ponds: Delaware City (NC), Commons, 21 June 1897 (A); Noxon- 

 town Pond (NC), C. 0. Houghton, 20 June 1916 (UD). 



A. occidentalis (Pursh) Victorin. {Philotria angustifolia (Muhl.) 

 Brit.) 

 A northern species, infrequent in New Castle and Cecil Counties ; 

 rare farther south: in Miles River, n. w. of Easton (Ta), Earle, 2221, 

 4 July 1939 (P). Fl. June to Aug. 



A. densa (Planch.) Vict. 



Commonly grown in aquariums and fish ponds; occasionally 

 escaping and persisting in ponds and streams : in Wicomico River, 

 s. w. of Sahsbury (Wi), R. R. Tatnall, 3962, 8 Sept. 1938 (T); 

 Hoopes Reservoir, n. w. of Wilmington, R. R. Tatnall, 4980, 12 

 Oct. 1941 (T). Fl. Oct. 



Vallisneria L. Tape Grass. 

 V. americana Mx. ( V. spiralis of Gray's Man., ed. 7.) 



Common in ponds and slow streams of the Coastal Plain. Fl. 

 July to Sept. 



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