1. Fraxinus americana   pine   ash   spruce   hickory   Hint Half-n-half Clue   2. Hibiscus lasiocarpus   hibiscus   pine   cedar   walnut   Half-n-half Clue   3. Picea pungens   maple   spruce   birch   hickory   Half-n-half Clue   4. Betula nigra   maple   pine   oak   birch   Half-n-half Clue   5. Acer rubrum   sycamore   ash   maple   cedar   Half-n-half Clue   6. Quercus velutina   birch   sycamore   hibiscus   oak   Half-n-half Clue   7. Pinus aristata   birch   hibiscus   oak   pine   Half-n-half Clue