water fern

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water fern,

common name for various species of aquatic fernsfern,
any plant of the division Polypodiophyta. Fern species, numbering several thousand, are found throughout the world but are especially abundant in tropical rain forests. The ferns and their relatives (e.g.
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References in periodicals archive ?
The Canal and River Trust, the charity that cares for the nation's historic waterways, has released the 2mm-long weed weevils into the Huddersfield Broad Canal near Colnebridge so they can eat the Water Fern (Azolla filliculoides).
Water ferns reveal the secret to underwater success: surface science.
Plants such as floating pennywort, waterprimrose, New Zealand pigmyweed, parrot's feather and water fern can be found in ponds.
Last summer an invasion of floating water fern was smothering ponds at Portrack Marsh and Northumbrian Water and the Tees Valley Wildlife Trust had to engage an army of expensive aquatic weevils as a biological pest control.
Laboratory host range testing on the flea beetle, Pseudolampsis guttata (LeConte) (Coleoptera: Chrysomelidae), a potential natural enemy for red water fern, Azolla filiculoides Lamark (Pterophyta: Azollaceae) in South Africa.
Problem species include the South American water primrose, parrot's feather, New Zealand pygmy weed, floating pennywort and water fern.
Other water plants to avoid because of their invasive nature are floating pennywort, Hydrocotyle ranunculoides ; parrot's feather, Myriophyllum aquaticum ; and water fern, Azolla filiculoides .
In four papers published over the past 6 years, her team showed that the drug can severely stunt the growth of barley, corn, the water fern Azolla filiculoides, and the three common garden weeds redroot pigweed, broad-leafed plantain, and sheep sorrel.
Small floating plants such as water fern Azolla spp.
Nuclear and cytoplasmic changes during early stages of cell differentiation in roots of the water fern, Azolla pinnata.
McKenna has both Farloe Joey and Water Fern in the final line-up and the latter is the likely leader from trap five.
Of particular note are the Water Fern, Azolla filiculoides, currently being biologically controlled by a tiny American weevil in some of our canals and the floating pennywort, Hydrocotyle ranunculoides, being controlled physically in some rivers.