USA's flora

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Across
  1. 1. This flower replaced Bluegrass as a state flower
  2. 5. This tree is now only present as a fossil
  3. 6. The flower of this state is Mayflower
  4. 10. This tree represents the state of Delaware
  5. 11. A flower that represents the state of Indiana
  6. 12. This states state tree is Cottonwood
Down
  1. 2. This flower is the national flower of the US
  2. 3. The state tree of Texas
  3. 4. Is used to make oil that soothes sunburnt skin
  4. 7. This flower is connected to Christmas
  5. 8. Mississippi named a city after their state tree which is
  6. 9. This flower blooms during winter