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Utricularia

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Utricularia

Post by sujin007 on Fri Nov 23, 2012 7:32 pm

Utricularia, or collectively known as bladderworts, is a genus of carnivorous plants consisting of about 220 species. They occur in fresh water and wet soil as terrestrial or aquatic species, on every continent accept Antarctica.

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Re: Utricularia

Post by sujin007 on Fri Nov 23, 2012 7:34 pm

Most species have very small traps, in which they can catch only minute prey, like protozoa. Traps can range from 0.2mm – 1.2cm, with larger traps, trapping larger prey like water fleas and even small tadpoles.


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Re: Utricularia

Post by sujin007 on Fri Nov 23, 2012 7:35 pm

They are the only carnivorous plants that make use of bladder traps. The traps have small trigger hairs attached to a trapdoor. The bladder, when set, is under negative pressure in relationship to its surrounding area.


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Re: Utricularia

Post by sujin007 on Fri Nov 23, 2012 7:37 pm

When the trigger hairs are tripped, the trap door opens up, sucks in the insect and surrounding water, and closes the door again, all in a matter of 10 thousands of a second.







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