1. Juglans nigra   walnut   birch   ash   hibiscus   Hint Half-n-half Clue   2. Quercus velutina   oak   spruce   cedar   walnut   Half-n-half Clue   3. Fraxinus americana   ash   birch   cedar   hickory   Half-n-half Clue   4. Betula nigra   walnut   oak   birch   sycamore   Half-n-half Clue   5. Juniperus virginiana   birch   cedar   maple   walnut   Half-n-half Clue   6. Hibiscus lasiocarpus   maple   walnut   sycamore   hibiscus   Half-n-half Clue   7. Carya ordorata   spruce   birch   maple   hickory   Half-n-half Clue