birchen

from WordNet (r) 3.0 (2006)

birchen
    adj 1: consisting of or made of wood of the birch tree [syn:
           {birch}, {birchen}, {birken}]

from The Collaborative International Dictionary of English v.0.48

Birchen \Birch"en\ (b[~e]rch"'n), a.
   Of or relating to birch.
   [1913 Webster]

         He passed where Newark's stately tower
         Looks out from Yarrow's birchen bower.   --Sir W.
                                                  Scott.
   [1913 Webster]