MARYLAND WEATHER SERVICE 395 



Potamogeton mysticus Morong. 



Worcester County, Ocean City (H. L. Clark). 



Potamogeton crispus L. 



Coastal Zone, common in the fresh waters at the heads of tidal estuaries. 



Potamogeton zosteraefolius Schum. 



Harford County, Gunpowder River (Robert K. Miller). 



Potamogeton pusillus L. 



Coastal and Midland Zones; in ponds aud streams; frequent. 

 Worcester County, Snow Hill (1087). 



Potamogeton diversifolius Raf. 



Throughout the state; in ponds and streams; common. 

 Dorchester County, Hurlock (1821). 



Potamogeton pectinatus L. 



Coastal Zone; in ponds and fresh tidal streams, frequent. 

 Kent County, Cliffs Landing (1697). 



Naias flexilis (Willd.) Rost. & Schni. 



Coastal and Midland Zones; in streams; frequent. 

 Washington County, Hancock (742). 



Naias gracillima (A. Br.) Morong. 



Wicomico County, Shad Point (1200). 



Zostera marina L. Eel Grass. 



Coastal Zone; in shallow salt waters of Chincoteague and Chesapeake 

 Bays; frequent. 



SCHEUCHZERIACEAE. 



Triglochin striata R. & P. Arrow-grass. 



Confined to the lower Eastern Shore; in salt and brackish marshes; 



infrequent. 

 Worcester County, Greenbackville (1117). 



ALISMACEAE. 



Alisma plantago-aquatica L. Water Plantain. 



Throughout the state; in marshes and all open wet situations; common. 



Lophotocarpus spongiosis (Engelm.) J. G. Smith. 



Wicomico County, marshes of the Nanticoke River near Vienna (1296). 



Sagittaria engelmanniana J. G. Smith. 

 Wicomico County near Vienna (1309). 



Sagittaria latifolia Willd. (variabilis Engelm.) Arrowhead. 



Throughout the state; in swamps and open moist situations; common. 

 Worcester County near Wagram (1162). 



