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A. filiculoides was first recorded in Europe in 1870s–1880s, when the species may have been accidentally transported in ballast water, with fry, or directly as an ornamental or aquarium plant. It was introduced into Asia from East Germany in 1977 as an alternative to the cold susceptible native strain of A. pinnata , used as a green manure in ...
Azolla filiculoides root cross section Azolla covering the Canning River, Western Australia Azolla is a highly productive plant . It can double its biomass in as little as 1.9 days, [ 13 ] depending on growing conditions, and yield can reach 8–10 tonnes fresh matter/ha in Asian rice fields. 37.8 t fresh weight/ha (2.78 t/ha dry weight) has ...
Azolla cristata , the Carolina mosquitofern, [3] Carolina azolla or water velvet, is a species of Azolla native to the Americas, in eastern North America from southern Ontario southward, and from the east coast west to Wisconsin and Texas, and in the Caribbean, and in Central and South America from southeastern Mexico south to northern Argentina and Uruguay.
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The most spread alien plant in Europe was Elodea canadensis (Found in 41 European countries) followed by Azolla filiculoides in 25 countries and Vallisneria spiralis in 22 countries. [56] The countries with the most recorded alien aquatic plant species were France and Italy with 30 species followed by Germany with 27 species, and Belgium and ...
Azolla pinnata is a species of fern known by several common names, including mosquitofern, [2] feathered mosquitofern and water velvet. It is native to much of Africa, Asia (Brunei Darussalam, China, India, Japan, Korea, and the Philippines) and parts of Australia. It is an aquatic plant, it is found floating upon the surface of the water.
The upper lobe of the leaf is larger than the lower, in contrast to A. filiculoides where the lower leaf is larger in outline. [2] The sporocarps are in groups of four, not in pairs such as in the other species. The plant never attains a red color, such as is often seen towards the end of the growing season in all other Azolla species. [3]
The Salviniaceae contain the two genera Azolla and Salvinia, [4] with about 20 known species in total. [5] The oldest records of the family date to the Late Cretaceous. [ 6 ] Azolla was previously placed in its own family, Azollaceae , but research has shown Azolla and Salvinia to be sister genera with the likely phylogenic relationship shown ...