Wolffia
water-meal
3 species
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Wolffia borealisnorthern watermeal
Distribution: Oregon and Idaho, and most of the United States from Kansas east and Tennesee north
Habitat: Ponds and standing water at low elevations
Origin: Native
Wolffia brasiliensisBrazilian watermeal
Distribution: Common in central and eastern United States, occasional in Washington to California, chiefly west of the Cascades
Habitat: Ponds and standing water at low elevations
Origin: Native
Wolffia columbianaColumbian watermeal
Origin: Native