Roots of Poznan

The roots of this kind of tree protrude from the ground. I have been told the reason but I don't really remember. Can somebody help? Meanwhile, this reminds me the scenes of mother hen with her chicks walking behind her. Only bigger and less fast.

Spotted in a botanic garden close to Poznan, Poland

Roots of Andechs

 

I like, therefore I post. :-)

Back to the roots

Andechs-36
Originally uploaded by b_orionis

What do you think this looks like?