240 



LXXVIII. NAIADE^i. [II. Monocotyledons 



960. Potamogeton lucens, L. 961. Polamogetonprcelongus, Wulf. 



Shining Pmdweed. Zo„g Pondmeed. 



962. Potamogeton perfoliatus, L. 

 Perfoliate Pondwced. 



963. Potamogeton crispus, L. 



Curly Pojtdiveed. 



