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Pontederiaceae family (1 species)

Eichhornia crassipes
(Martius) Solms
in A. de Candolle & C. de Candolle, Monogr. Phan. 4: 527.  1883.
Bas.: Pontederia crassipes Martius (1823).

Water hyacinth
Naturalized quite rare aquatic herb of drainage canals.
Native to northern South America and Brazil.

Also a cultivated ornamental.
It is on the "100 of the World's Worst Invasive Alien Species" list.
However it is only a nuisance species here in a few drainage canals. Were it to reach the Roseau reservoir, the consequences would be severe.