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Wolffia arrhizaRootless water meal |
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At the moment of the flowering At the time of
flowering, duckweed multiplies vegetatively. In the photo new fronds
can be seen emerging from the right and left pockets. |
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Swollen duckweedAs Lemna gibba prepares to flower, the
fronds grow to twice the size of normal vegetative fronds. |
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Duckweed in a pond Frequently, several forms of duckweeds
are encountered in a pond: Lemna minor, Lemna gibba and
Spirodella polyrhiza. |
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Karasun LakeKrasnodar, June - 1998
In a single week duckweeds can increase their mass two-fold and cover
the entire surface of a reservoir. |
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Canals and ponds Frequently duckweed covers canals and
ponds in the suburbs of Krasnodar with a continuous carpet. June,
2000. |
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Duckweed in a creekDuckweed is transferred from one reservoir in
another by the current of water. |
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Duckweed and the frog |
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Duckweed and the bee The large plant here - Lemna
gibba has a length of 2-3 mm. A little smaller are two forms of
Wolffia, each with a length of 1 mm.
Photograph from the book, Biology of
Plants(P.H. Raven, R.F. Evert., S.E. Eichhorn., 1986, Russian
translation, Современная ботаника, 1990). |
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Duckweed in the soilDuckweed can grow in soil near
reservoirs. |
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Water eggs A woman in Taiwan gathers a harvest of "to knai-
us" from a plantation of duckweed. Wolffia globosa is termed
"water eggs", since the plants of Wolffia resemble millions of
small green eggs. Fronds of Wolffia contain about 40%
protein, almost as much as soybeans. Furthermore, Wolffia
contains a quantity of the essential amino acid, methionine. http://daphne.palomar.edu/wayne/imgwotha.htm |
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Duckweed and crocodilesPhoto from the
periodical GEO (ГЕО). September,
1999. |