Hydrilla verticillata (L.f.) Royle
Hydrilla verticillata image
Michael Lo  
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image
Hydrilla verticillata image