Duckweed (Lemna minor) is a rapidly spreading, aquatic perennial, free-floating plant that can be invasive, especially if fertilizer is applied to the growing site. It's dramatic foliage discourages algae growth.
About this Author
Callie Barber has been writing professionally since 2002. Barber's love for design and writing inspired her to create Design Your Revolution, a blog that shares creative and affordable ways to decorate indoor and outdoor living environments. Her articles have appeared on Travels.com and GardenGuides.com. Barber holds a Bachelors of Arts in international studies from the University of North Carolina.