waterlily   
betsimihilana
[tsy, not, mihilana, inclining.] The leaves of the water lily called tatamo. [Richardson 1885]
tatamo
a large blue water lily. Nymphaea stellata, Willd. [Richardson 1885]
a water lily [Hallanger 1973]
voahirana
a kind of water lily [Hallanger 1973]