Les écorces

                                                                                          Acer Pensylvanicum

                                                                                      Acer Rufinerve Winter Gold

               Prunus serrula

Betula Utilis

Heptacodium Myconoïde

                        Betula Costata                             Acer Griseum              Acer Tegmentosum

           Betula Albo Sinensis "Fascination"                                         Betula Nigra