| Clue | Source | Date |
|---|---|---|
| Having rounded protrusions | Premier Sunday | 26 Feb 2023 |
| Protuberant | Wall Street Journal | 06 Mar 2021 |
| Lumpy; knotty | The Times Concise | 25 Feb 2021 |
| Tree-trunk descriptor | Newsday | 31 Aug 2019 |
| Like some knees | USA Today | 11 Feb 2016 |
| Like some knees | ||
| Like a good-for-climbing tree trunk | Wall Street Journal | 16 Sep 2015 |
| Like a good-for-climbing tree trunk | ||
| Like some tree trunks | ||
| Like some tree trunks | ||
| Like some knees | ||
| Like some knees | ||
| Not smooth | ||
| Tuberous | ||
| Like some knees | ||
| Like some knees | ||
| Having protuberances | ||
| Covered with protuberances. |