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