| canada | alberta | arnica fulgens | species | 2 | 0 |
| canada | alberta | arnica gracilis | species | 2 | 0 |
| canada | alberta | arnica louiseana | species | 4 | 0 |
| canada | alberta | arnica ovata | species | 2 | 0 |
| canada | alberta | arnica rydbergii | species | 9 | 0 |
| canada | british columbia | arnica amplexicaulis | species | 2 | 0 |
| canada | british columbia | arnica chamissonis | species | 2 | 0 |
| canada | british columbia | arnica cordifolia | species | 2 | 0 |
| canada | british columbia | arnica fulgens | species | 2 | 0 |
| canada | british columbia | arnica lanceolata | species | 1 | 0 |
| canada | british columbia | arnica lanceolata subsp. prima | subspecies | 2 | 0 |
| canada | british columbia | arnica latifolia | species | 2 | 0 |
| canada | british columbia | arnica mollis | species | 8 | 0 |
| canada | british columbia | arnica nevadensis | species | 1 | 0 |
| canada | british columbia | arnica sororia | species | 4 | 0 |
| canada | northwest territories | arnica angustifolia subsp. angustifolia | subspecies | 11 | 0 |
| canada | northwest territories | arnica griscomii subsp. frigida | subspecies | 6 | 0 |
| canada | nunavut | arnica angustifolia subsp. angustifolia | subspecies | 8 | 0 |
| canada | quebec | arnica lanceolata | species | 4 | 0 |
| canada | quebec | arnica mollis | species | 4 | 0 |
| canada | yukon | arnica angustifolia | species | 8 | 0 |
| canada | yukon | arnica chamissonis | species | 8 | 0 |
| canada | yukon | arnica cordifolia | species | 8 | 0 |
| canada | yukon | arnica diversifolia | species | 3 | 0 |
| canada | yukon | arnica griscomii | species | 2 | 0 |
| canada | yukon | arnica latifolia | species | 4 | 0 |
| canada | yukon | arnica lessingii | species | 3 | 0 |
| canada | yukon | arnica lonchophylla | species | 7 | 0 |
| germany | | arnica montana | species | 1 | 0 |
| greenland | | arnica angustifolia | species | 6 | 0 |
| japan | gunma prefecture | arnica unalaschcensis | species | 2 | 0 |
| japan | hokkaido prefecture | arnica unalaschcensis | species | 2 | 0 |
| japan | iwate prefecture | arnica unalaschcensis | species | 2 | 0 |
| japan | kyoto prefecture | arnica mallotopus | species | 15 | 0 |
| japan | nagano prefecture | arnica unalaschcensis | species | 2 | 0 |
| japan | toyama prefecture | arnica unalaschcensis | species | 1 | 0 |
| japan | yamagata prefecture | arnica unalaschcensis | species | 2 | 0 |
| united states | alaska | arnica griscomii | species | 3 | 0 |
| united states | alaska | arnica lessingii | species | 3 | 0 |
| united states | california | arnica mollis | species | 4 | 0 |
| united states | idaho | arnica chamissonis | species | 4 | 0 |
| united states | idaho | arnica latifolia | species | 16 | 0 |
| united states | idaho | arnica mollis | species | 2 | 0 |
| united states | idaho | arnica parryi | species | 4 | 0 |
| united states | oregon | arnica longifolia | species | 2 | 0 |
| united states | oregon | arnica parryi | species | 2 | 0 |
| united states | wyoming | arnica longifolia | species | 2 | 0 |
| united states | wyoming | arnica sororia | species | 2 | 0 |