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Hydrocharis morsus-ranae

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Author: Carl Linnaeus 1753
Family:  Hydrocharitaceae
Habitat:   Algeria, Altay, Austria, Baltic States, Belarus, Belgium, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Great Britain, Greece, Hungary, Ireland, Irkutsk, Italy, Morocco, Netherlands, Norway, Palestine, Poland, Portugal, Romania, Russia, Spain, Sweden, Switzerland, Transcaucasus, Turkey, Ukraine, West Siberia, Yugoslavia
Soil:   No / very wet sphagnum
Water:   Maximum, slightly acid.
Sun:   Medium - Maximum
Thickness:  Not really
Height:  0,3 centimetres over water, 3-5 below.
Flower:   White
Propagate:   Seeds/Offsets
Names:   FrÝbid, Frogbit
Synonyms:  Pontederia dubia, Carl Ludwig von Blume 1827.
Hydrocharis dubia
, Cornelis Andries Backer 1925.
Sagittaria triflora, Miq.
Hydrocharis asarifolia,
Gray.
Hydrocharis batrachyodegma,
St.-Lag.
Hydrocharis cordifolia,
St.-Lag.
Hydrocharis rotundifolia,
Gilib.

This member of the Hydrocharitaceae family is my favourite among aquatic/floating plants. It rarely flowers in Denmark, but in 2013, I was lucky to find it in full flowering in Holmegards Mose.

It was given this name by Carl Linnaeus in 1752, and it is spread around Europe and near Asia. The leaves will lie on the surface of the slightly acid and nutrition poor water. Each leave can grow to four centimetres in diameter, each plant will have four to eight leaves. Besides from the seeds, it sets offspring which sink to the bottom in winter.