water willow
nounDefinition of water willow
1
: any of several plants that thrive in wet areas and are felt to resemble willows: such as
a(1)
: purple loosestrife
(2)
: swamp loosestrife
b
: fireweed sense b
c
: a plant of the genus Justicia
especially
: a North American rhizomatous plant (J. americana) that has slender elongated leaves and dense capitate to elliposidal inflorescences with pale violet or white flowers
2
: any of several willows that thrive in wet areas