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Lemna - Wikipedia
Duckweed: Care and Growing Guide - The Spruce
Lemna minor (common duckweed): Go Botany
Lemna minor - Wikipedia
Common duckweed - US Forest Service
Lemna minor (Common Duckweed) - Gardenia
Lemna minor - North Carolina Extension Gardener Plant Toolbox
Genus: Lemna (duckweed): Go Botany
Lemna minor - Plant Finder - Missouri Botanical Garden
Common duckweed | The Wildlife Trusts