| Clue | Source | Date |
|---|---|---|
| Cinquefoil (10) | ||
| Plant, strong one, backed without exception (10) | ||
| Turning L-plate into shrub (10) | ||
| Plant of a genus that includes the cinquefoils (10) | ||
| Mighty harmful, a plant | ||
| Plant or shrub with five-petalled flowers | The Telegraph General Knowledge | 24 Jan 2016 |