| canada | | palmaria palmata | species | 5 | 0 |
| canada | british columbia | palmaria palmata | species | 8 | 0 |
| canada | manitoba | palmaria palmata | species | 11 | 0 |
| canada | new brunswick | palmaria palmata | species | 3 | 0 |
| canada | newfoundland and labrador | palmaria palmata | species | 8 | 0 |
| canada | nova scotia | palmaria palmata | species | 26 | 0 |
| canada | prince edward island | palmaria palmata | species | 6 | 0 |
| canada | quebec | palmaria palmata | species | 5 | 0 |
| canada | yukon | palmaria palmata | species | 6 | 0 |
| france | | palmaria palmata | species | 2 | 0 |
| france | basse-normandie region | palmaria palmata | species | 2 | 0 |
| france | bretagne region | palmaria palmata | species | 51 | 0 |
| france | bretagne region | palmaria palmata var. sarniensis | varietas | 17 | 0 |
| ireland | | palmaria palmata | species | 1 | 0 |
| ireland | connaught province | palmaria palmata | species | 378 | 0 |
| ireland | munster province | palmaria palmata | species | 1 | 0 |
| ireland | munster province | palmaria palmata var. sarniensis | varietas | 1 | 0 |
| japan | hokkaido prefecture | palmaria palmata | species | 1 | 0 |
| norway | | palmaria palmata | species | 6 | 0 |
| norway | hordaland county | palmaria palmata | species | 2 | 0 |
| norway | nordland county | palmaria palmata | species | 2 | 0 |
| norway | sor-trondelag county | palmaria palmata | species | 2 | 0 |
| united kingdom | england | palmaria palmata | species | 16 | 0 |
| united kingdom | northern ireland | palmaria palmata | species | 84 | 0 |
| united kingdom | northern ireland | palmaria palmata var. sarniensis | varietas | 157 | 0 |
| united states | | palmaria palmata | species | 1 | 0 |
| united states | maine | palmaria palmata | species | 8 | 0 |
| united states | rhode island | palmaria palmata | species | 2 | 0 |