| Clue | Source | Date |
|---|---|---|
| Tree with a sticky inner bark | USA Today | 03 Oct 2019 |
| Tree that yields a dietary supplement | USA Today | 24 Mar 2019 |
| Tree that yields a dietary supplement | ||
| Tree with a sticky inner bark | ||
| Its bark is used as an herbal supplement | ||
| A demulcent | ||
| Hardwood tree. |