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Here is a plant I found growing with Utricularia simulans, wich is very similar to it.
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Utricularia sandwithii is a plant wich seem to be new for Fr.Guyana by the discovery of this station.
The identity of the plant have been confirmed by Dr.Andreas Fleischmann.
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The species was cited in Hoff & Cremer's list from 2004, but without any data
about it's localisationnore if it's really present in _French_ Guyana.
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Many ancient botanical studies have been made in the Guyana area,
and the presence of some plants have to be confirmed first, regarding our country. 
For this species it is the case now.
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U.simulans 13 06 2012 marivat (6)
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The plant is very similar to U.simulans.  The 2 species grow together at the same place of the biotope,
but the first to flourish is U.simulans ; U.sandwithii  will follow  3 to 4 weeks later.
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The plants present in Fr.Guyana look pretty different from the typical plants  :
The type plants have a reddish inflorescence, red sepals and yellow petals.
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U.simulans have green stalks, and yellow corollas.
The form of U.sandwithii from Fr.Guyana have a green stalk, and yellow corollas.
This is certainly the reason why it's presence seem to have never been confirmed.
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U.simulans 13 06 2012 marivat (24)
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The station is situated in a savana, wich is covered with tall and thick grasses at this place of the biotope.
The situation of this particuliar biotope is also special : 
it is not innoundated, and if it is, only a small layer of water will cover the ground for a short period.
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This plant will flourish only after weeks of sunny weather, when the ground is rather dry,
near to the end of the rainy season. The plants have to push themselves 30cm out of the grasses 
before it is granted to develop the flowers :
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U.simulans 13 06 2012 marivat (19)
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The fact is that these plants begin their live as very small beings : 
curiously, they begin to build the flowers at the same time as they grow !
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U.simulans 13 06 2012 marivat (14)
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Once they grow enough, they build their flowers.
This picture illustrate this : the plants are present at two stages, in full bloom and in full growth :
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U.sandwithii 13 06 2012 marivat (11)
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Of course, some plants will build their flowers before all the others...
But this depends also from the conditions : if they are more rude, the plants will be smaller :
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Utricularia simulans savane Marivat (18)
Utricularia simulans savane Marivat (16)
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This plant is a jewel :
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U.sandwithii savane Marivat (21)
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The morphology of the plants present in Fr.Guyana must be examinated more precisely,  
as there are evidences for these plants to be a subspecies of U.sandwithii 
or a natural hybrid between U.sandwithii & U.simulans - pers.comment from A.Fleishmann.
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If the plants are hybrids, both parents should be present somewhere in the area ; 
if not, then the hybrid is fertile. But the plant is most certainly only a local variation of the species.
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Any further & new informations will be published here after verification.
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