Vallisneria

noun
Val·lis·ne·ria | \ ˌvalə̇ˈsnirēə , -lə̇zˈn- \

Definition of Vallisneria 

: a genus of submerged aquatic plants (family Hydrocharitaceae) with ribbonlike leaves and pistillate spathes on long finally spiral scapes

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History and Etymology for Vallisneria

New Latin, from Antonio Vallisnieri †1730 Italian naturalist + New Latin -ia

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occurring twice a year or every two years

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