Species
- Arnica acaulis (Walt.) B.S.P. -- Common Leopardbane
- Arnica alpina (L.) Olin -- Alpine Arnica
- Arnica amplexicaulis Nutt. -- Clasping Arnica, Streambank Arnica
- Arnica angustifolia Vahl -- Narrowleaf Arnica
- Arnica cernua T.J. Howell -- Serpentine Arnica
- Arnica chamissonis Less. -- Chamisso Arnica
- Arnica cordifolia Hook. -- Heart-leaf Leopardbane, Heartleaf Arnica
- Arnica discoidea Benth. -- Rayless Arnica
- Arnica X diversifolia Greene (pro sp.) -- Curtis Churchmouse Threeawn, Rayless Arnica, Sticky Arnica
- Arnica frigida C.A. Mey. ex Iljin -- Snow Arnica
- Arnica fulgens Pursh -- Foothill Arnica, Orange Arnica, Shining Leopardbane
- Arnica gracilis Rydb. -- Smallhead Arnica
- Arnica lanceolata Nutt. -- Arnica, Lanceleaf Arnica
- Arnica latifolia Bong. -- Broadleaf Arnica
- Arnica lessingii (Torr. & Gray) Greene -- Nodding Arnica
- Arnica lonchophylla Greene -- Longleaf Arnica
- Arnica longifolia D.C. Eat. -- Longleaf Arnica, Spearleaf Arnica
- Arnica louiseana Farr -- Lake Louise Arnica
- Arnica mollis Hook. -- hairy arnica, wooly arnica
- Arnica montana L. -- Mountain Arnica
- Arnica nevadensis Gray -- Nevada Arnica
- Arnica parryi Gray -- Nodding Arnica, Parry's Arnica
- Arnica rydbergii Greene -- Rydberg Arnica, Rydberg's Arnica, Subalpine Arnica
- Arnica sororia Greene -- Twin Arnica
- Arnica spathulata Greene -- Klamath Arnica
- Arnica unalaschcensis Less. -- Alaska Arnica
- Arnica venosa Hall -- Shasta County Arnica
- Arnica viscosa Gray -- Mt. Shasta Arnica
Mountain Arnica (Arnica montana)  Mountain Arnica ( Arnica montana) Longleaf Arnica (Arnica longifolia)
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