| Clue | Source | Date |
|---|---|---|
| Maple's annual growth marking: 2 wds. | ||
| Indicator of arboreal age | The Times Concise | 27 Feb 2025 |
| Annual growth indicator | New York Times | 03 Apr 2024 |
| Circle of life? | LA Times Daily | 24 Jan 2024 |
| It's indicative of Holly showing age starting trouble by lough in Waterford | Irish Times Crosaire | 07 Apr 2020 |
| This gives you some idea how long one is in The Cherry Orchard perhaps with Holly at amphitheatre | Irish Times Crosaire | 12 Oct 2017 |
| Trunk line? | ||
| Year indicator |