| Clue | Source | Date |
|---|---|---|
| Plant pores | LA Times Daily | 21 Apr 2019 |
| Plant pores | The Washington Post | 21 Apr 2019 |
| Plant pores | ||
| Plant pores | ||
| Plant pores | ||
| Leaf pores | ||
| Leaves' "pores" | ||
| Plant pores | ||
| Leaf openings | ||
| Leaf apertures | ||
| Pores | ||
| Botanical apertures | ||
| Plant openings | ||
| Mouthlike openings |