Hill: Penobscot Plants. 215 



PoTAMOGETON BUPLEUROiDEs Fernald. Shallow water at 

 edge of brackish pond, Otter Ponds, Swans Island (No. 

 2341). 



PoTAMOGETON DiMORPHus Raf. Rare. Torrey Pond, Deer 

 Isle (No. 1989). 



RuppiA MAKiTiMA L., var. LoxGiPEs Hagstrom.' Brackish 

 ponds, Swans Island. 



ZosTEPtA MARINA L. Abundant in shallow water on muddy 

 shores, iisnally below low tide level. 



JUNCAGIlSrACEAE 



TRiGLOCHiiir MARiTi:\rA L. Common on miiddy shores and 

 in salt marshes. 



ALISMACEAE 



Sagittaria latifoeia Willd. Rare. Shallow water, shores 

 of Torrey Pond, Deer Isle (No. 1964). Variable, show- 

 ing transitions to forma obtusa (Muhl.) Robinson (No. 

 1968), and forma gracilis (Pursh) Robinson (No. 1966). 



*Sagittaria gramixea Michx. Isle an Haut (N. T. 

 Kidder). 



GRAMINEAE 



Panicum capillare L. Rare. Clearing in dry woods, 

 Brooklin (No. 1787). 



Paiv^icum piiiladelpiiici :m Bernh. Dry woods near Sunset, 

 Deer Isle (No. 1865). 



1. Botaniska Notiser (1911) 138. See Fernald, M. L., and Wiggand, 

 K. M., Rhodora 16: 119-127 (1914). ' '■; 



