ˈ ̷ ̷( ̷ ̷) ̷ ̷ˌ ̷ ̷ noun
1. : a plant of the genus Pontederia ; especially : an American aquatic herb ( P. cordata ) growing in shallow water of streams and ponds and having spikes of blue flowers and cordate or sagittate leaves
2. : any of various still-water species of the genus Potamogeton