Azolla pinnata is a species of fern known by several common names, including feathered mosquitofern and water velvet. It is native to much of Africa, Asia from China to Japan, India and the Philippines, and parts of Australia. It is an aquatic plant, its frond floating upon the surface of the water. It grows in quiet and slow-moving water bodies, because swift currents and waves break up the plant.
Azolla pinnata can spread rapidly, and has the ability to survive on moist soil in and around rivers, ditches, and ponds. It forms dense surface mats, which degrade water quality by reducing oxygen levels, and can interfere with boating, fishing and recreational activities.
Species recognized by Hassler M., , World Ferns: Checklist of Ferns and Lycophytes of the World in
Attributes / relations provided by ♦1USDA Plants Database, U. S. Department of Agriculture ♦2Kattge, J. et al. (2011b) TRY - a global database of plant traits Global Change Biology 17:2905-2935 ♦3HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández