ALDROVANDA

 

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Aldrovanda vesiculosa

A SINGLE SPECIES

Aldrovanda vesiculosa and some red coloured variations

 

USUAL NAME

waterwheel plant

FAMILY

Droseraceae

 
History and etymology

Observed in India in the sixteenth century, called "Duckweed palutris indica" by L. Plukenet in 1696. Almost fifty years later, G. Monti named it "Aldrovandia vesiculosa" in honor of U. Aldrovandi, an Italian naturalist. Even if there is a removal of the 'i', now we adopt the spelling "Aldrovanda vesiculosa" after the index Nominorum Genericorum. In 1753, C. Linnaeus's spelled this name in his book Species plantarun.

Distribution

From Europe to Africa, Asia, Japan and Australia ; despite an immense area, the sites are scattered and the plant is exctinct in many countries.

Biotope

Of a quite tropical nature, the Aldrovanda remains a relic of warmer period in cold regions. It likes sweet and calm waters, ditches, ponds, rivers arms with acidic pH. This plant is related to aquatic vegetation, as well as deciduous trees, whose leaves contribute, as it decays in water, the development of humic material necessary for prey and the plant.

Description

Small floating aquatic plant without roots, measuring 10-50 cm long. The green leaves, are 7 or 8 and are combined in an alternating whorls.
Traps are 5 to 7 mm in length, are translucent and reminds those of Dionaea, in a miniaturized size. Their closure is very fast: 1 / 50 sec
The prey are usually arthropods Daphnia, Cyclops, mosquito larvae.
The tiny greenish white flowers (8 mm diameter) are rare in nature.

A flowering plant

An amazing all red variation

The winter buds in spring

genlisea.jpg

drosera_mod2.jpg

utricula_mod2.jpg




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