| Clue | Source | Date |
|---|---|---|
| American shrub that can cause 21 Across rashes | The Telegraph Cross Atlantic | 15 Apr 2025 |
| Climbing plant that can cause itching | Wall Street Journal | 26 Sep 2016 |
| Toxicodendron diversilobum | ||
| Rash cause | ||
| Rash-inducing bush | ||
| Gardener's bane | ||
| Sumac variety. |