| Family | ASTERACEAE |
| Genus species | Arnica rydbergii Greene trib. Heliantheae |
| Synonyms | Arnica aurantiaca Greene |
| Arnica caespitosa A.Nelson | |
| Arnica tenuis Rydb. | |
| Habitat | dry, stony grassland |
| Altitude | 1200-3400m |
| Description | basal leaves petiolate, oblanceolate or spathulate, stem leaves 3-4 pairs, sessile, similar, capitula solitary, campanulate, ligules 1-2cm long |
| Size | 10-30cm |
| Color | yellow |
| Bloom | summer |
| Ca | |
| Type | tuft |
| Cultivation | sunny site with a deep, drained soil alpine house, rich, drained soil, sun |
| Propagation | seed in spring, barely covered, germ. 1 month, 10-16°C division in spring; cuttings in late summer |
| Territory |
Northern America
Western Canada (Alberta , British Columbia ) Northwestern U.S.A. (Colorado , Idaho , Montana , Oregon , Washington , Wyoming ) Southwestern U.S.A. (Utah) |
| Bibliography | Plants of the World online powo.science.kew.org International Plant Names Index www.ipni.org |
| Comments | ASTERACEAE
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