ANGIOSPERMAE. 



MONOCOTYLEDONES. 



TYPHACEAE. 



Typha latifolia L. Cat-tail. 



Throughout the state, in marshes and swamps, along streams, and about 

 the margins' of ponds, being most common in open situations and 

 often forming pure stands. 



Typha angustifolia L. 



Throughout the Coastal Zone, and in a few localities in the Lower 

 Midland. Is more abundant than the preceding in the lower Eastern 

 Shore, but the two often occur together. 



SPARGANIACEAE. 



Sparganium eurycarpum Engel. Bur-reed. 



Throughout the state; in marshes, swamps and along the margins of 

 streams and ponds, growing in saturated soil or as an emersed 

 aquatic; common. 

 Anne Arundel County, Hills Bridge (1548). 



Sparganium androcladum (Engelm.) Morong. 



Baltimore County, Towson (Robert K. Miller). 



NAIADACEAE. 



Ruppia maritima L. 

 Coastal Zone. 



Potamogeton natans L. Pondweed. 



Throughout the state; in quiet and running water; common. 



Potamogeton pulcher Tuck. 



Coastal and Midland Zones; in quiet and running water; frequent. 

 Dorchester County, Little Blackwater River (1597). 



Potamogeton nuttallii Cham. Sch. 



Throughout the state; in streams and ponds; common. 

 Worcester County, Boxiron (1065). 



Potamogeton lonchites Tuck. 



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

 Washington County, Hancock (742). 



Potamogeton perfoliatus L. 



Common in the Coastal Zone; infrequent in the Midland; commonest 

 in the fresh waters at the heads of tidal estuaries. 



