1. cèdre   fir   cedar   birch   poplar   Hint Half-n-half Clue   2. érable   fir   elm   poplar   maple   Half-n-half Clue   3. arbre de châtaigne   birch   beech   cedar   chestnut   Half-n-half Clue   4. bouleau   fir   birch   poplar   cedar   Half-n-half Clue   5. orme   chestnut   beech   elm   maple   Half-n-half Clue   6. hêtre   beech   pine   birch   fir   Half-n-half Clue   7. chêne   beech   fir   chestnut   oak   Half-n-half Clue