Anacharis is a genus of plants of the natural order Hydrocharidaceae, the species of which grow in ponds and streams of fresh water; water-thyme or water-weed. Anacharis Alsinastrum has been introduced from North America into European (including British) rivers, canals, and ponds, and by its rapid growth in dense tangled masses tends to choke them so as materially to impede navigation. Research Anacharis
Hydrocharidaceae is a natural order of mono-cotyledonous floating and creeping plants, inhabiting ditches, rivers, and lakes in various parts of the world. The genusAnacharis belongs to it. Research Hydrocharidaceae
 
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