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These terms define your current search. Click the × to remove a term. Taxa - Plantae: Magnoliophyta > Liliopsida > Commelinales > Pontederiaceae × 94 items, grouped by Government, Law and Regulations (view ungrouped items) government and administration (2)    (Click to View) Plant biology and other issues that relate to the management of water hyacinth: a global perspective with focus on Europe EPPO bulletin (Click to View) Heavy metal biomonitoring and phytoremediation potentialities of aquatic macrophytes in River Nile Environmental monitoring and assessment law (1)    (Click to View) Eichhornia crassipes control in the largest Portuguese natural freshwater lagoon EPPO bulletin