| Clue | Source | Date |
|---|---|---|
| Very old South American flower | ||
| Genus of periwinkles (5) | ||
| The periwinkle genus (5) | ||
| ANY OF VARIOUS PERIWINKLES | ||
| Flowering plant college planted in vain, shrivelled | ||
| Ground cover plant also called periwinkle | The Washington Post | 16 Sep 2018 |
| Ground cover plant also called periwinkle | LA Times Daily | 16 Sep 2018 |
| Ground cover plant also called periwinkle | ||
| Common ground cover | Universal | 17 Jun 2015 |
| Common ground cover | ||
| Plant used as ground cover | ||
| Common ground cover |