Nymphaea ondinea is an flowering aquatic plant in the family Nymphaeaceae native to northwestern Australia. Originally classified in its own genus as Ondinea purpurea, molecular studies have shown that it is morphologically aberrant species of Nymphaea, to which it has been transferred. It grows from a corm-like rhizome and is found in ephemeral pools and rivers that are dry for a significant portion of the year. The rhizome survives the dry season in drying mud.