Spanjaardslaan 27 8917 AL, Leeuwarden
"denotation"=>"natural_monument","genus"=>"Acer","leaf_cycle"=>"deciduous","leaf_type"=>"broadleaved","ref:lwdtrees"=>"1501:1890","source:date"=>"2015-08-26","species"=>"Acer pseudoplatanus","start_date"=>"1904","taxon"=>"Acer pseudoplatanus 'Leopoldii'"