| Answer | Crossword Clue |
|---|---|
| ANNULUS | Tree ring, for one |
| SEAL | Piston ring, for one |
| LOBE | One place for a ring |
| ACTOR | Tree, for one. |
| CATALPA | Jacaranda tree, for one |
| POPLAR | Tulip tree, for one |
| YUCCA | Joshua tree, for one |
| ELM | The Liberty Tree, for one |
| FIR | Oregon's state tree, for one |
| YUCCA | The Joshua tree, for one |
| ELM | Boston's Liberty Tree, for one |
| ELM | Boston's late Liberty Tree, for one |
| ELM | Old Boston's Liberty Tree, for one |
| ASH | The mythical tree Yggdrasil, for one |
