1. birch   Betula nigra   Pinus aristata   Platanus occidentalis   Fraxinus americana   Hint Half-n-half Clue   2. maple   Carya ordorata   Betula nigra   Picea pungens   Acer rubrum   Half-n-half Clue   3. walnut   Juglans nigra   Acer rubrum   Hibiscus lasiocarpus   Fraxinus americana   Half-n-half Clue   4. ash   Betula nigra   Picea pungens   Quercus velutina   Fraxinus americana   Half-n-half Clue   5. hickory   Betula nigra   Fraxinus americana   Carya ordorata   Pinus aristata   Half-n-half Clue   6. oak   Juniperus virginiana   Juglans nigra   Betula nigra   Quercus velutina   Half-n-half Clue   7. pine   Acer rubrum   Platanus occidentalis   Pinus aristata   Fraxinus americana   Half-n-half Clue