| Clue | Source | Date |
|---|---|---|
| Trees whose nuts may be known as filberts | The Times Concise | 19 Sep 2024 |
| Variable eye colors | LA Times Daily | 25 Feb 2021 |
| Variable eye colors | The Washington Post | 25 Feb 2021 |
| Filbert trees | Wall Street Journal | 09 Sep 2017 |
| Nut trees | LA Times Daily | 01 Nov 2015 |
| Nut trees | ||
| Filberts | ||
| Shrubs with edible nuts | ||
| Shrubs with edible nuts | ||
| Trees of the birch family | ||
| Filbert trees | ||
| Filberts | ||
| Trees bearing filberts | ||
| Australian shrubs | ||
| Trees or nuts | ||
| Nuciferous trees. |