Ivy Duckweed Ivy duckweed grows in sheets of tiny green bodies or fronds held together by rootlike connectors. The sheet floats on the surface of the water or just below the surface of the water. Each frond is only about 5 mm across. It reproduces by budding. The sheet is formed because the new bud does not pinch off but remains attached by root-like connectors.
Many fine roots grow from the bottom of each frond.