eichhornia, water hyacinths (eichhornia azurea), invasive quarantine species in the lake

aquatic plant beautiful flower bloom blooming blossom blossoming commelinales commelinids common water hyacinth eceng gondok ecology eichhornia crassipes flora floral hydrophytes invasive species lake leaf lotus monocots natural nature ovate leaves azurea diversifolia heterosperma natans petal pontederiaceae purple quarantine spongy spring tropical flowers plants vegetation violet hyacinths wild