http://en.wikipedia.org/wiki/Platanus
http://en.wikipedia.org/wiki/Platanus_orientalis
http://en.wikipedia.org/wiki/Platanus_%C3%97_hispanica
http://www.oldandsold.com/articles11/trees-22.shtml
http://no.wikipedia.org/wiki/Sankthans
Peder Severin Krøyer

http://www.flickr.com/photos/31277456@N04/3693841386/ 
Populus petrowskiana