| Family | ASTERACEAE |
| Genus species | Arnica sororia Greene trib. Heliantheae |
| Bibliography | Ottawa Naturalist 23: 213 (1910) |
| Native Range | w. & c. Canada to w. USA |
| Primary Biome | Temperate |
| Habitat | grassland |
| Altitude | 500-1500m |
| Description | basal leaves crowded, oblanceolate, entire, stem leaves 3-6 pairs, similar, smaller, capitula 1-5, involucre broadly subspherical, bracts lanceolate, ligules 1-3cm |
| Size | 10-40cm |
| Color | orange-yellow |
| Bloom | late spring, summer |
| Ca | |
| Type | perennial |
| Cultivation | mesic, slightly humous, sunny site alpine house, moist, rich, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1 month, 10-16°C division in spring; cuttings in late summer |
| Synonyms | Arnica fulgens var. sororia (Greene) G.W.Douglas & Ruyle-Douglas Arnica stricta Greene |
| Territory | 7 Northern America 71 Western Canada (ABT Alberta, BRC British Columbia, SAS Saskatchewan) 73 Northwestern U.S.A. (IDA Idaho, MNT Montana, ORE Oregon, WAS Washington, WYO Wyoming) 76 Southwestern U.S.A. (CAL California, NEV Nevada, UTA Utah) |