Along the trails at Sarabråten, informative labels help identify tree species. The birches on the left sport the smooth, horizontally striped bark of the Dunbjørk (Betula pubescens). In English we call it a White Birch or Moor Birch. The blotchy trunks on the right belong to the Hengebjørk (Betula verrucosa), or Hanging Birch, so called because the new growth at the end of its branches droops downward.