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Wolffia arrhiza
Rootless 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 duckweed
As 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 Lake
Krasnodar, 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 creek
Duckweed 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 soil
Duckweed 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 crocodiles
Photo from the periodical GEO (ГЕО).
September, 1999. |
Biology