Table of Contents 



INTRODUCTION 1 



FAMILY KEY 2 



ZOSTERACEAE 3 



Zosteca 3 



Zoster a mar ina 3 



Selected References 3 



POTAMOGETONACEAE 3 



Potamogeton 5 



Key to Species 5 



Potamogeton robbinsii 12 



Potamogeton pectinatus 12 



Potamogeton f ilif ormis 12 



Potamogeton bicupulatus 17 



Potamogeton spir illus 17 



Potamogeton diver sifol ius 17 



Potamogeton epihydrus 21 



Potamogeton conf ervoides 21 



Potamogeton zoster if ormis 21 



Potamogeton hilli i 26 



Potamogeton foliosus 26 



Potamogeton f r iesi i 26 



Potamogeton str ictif ol ius 26 



Potamogeton obtusif olius 31 



Potamogeton pusillus 31 



Potamogeton vaseyi 36 



Potamogeton late ralis 36 



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