Leafy Arnica
Arnica chamissonis
Pollinator plant

(c) H. Zell, some rights reserved (CC BY-SA)
Growing it
| When | Flowers July to August |
|---|---|
| Type | wildflower |
| Sun | Full sun, partial shade |
| Water | Medium, high |
| Soil | pH 5.5–7.5 |
| Hardiness | zone 3–7 |
| Mature height | 0.7 m |
| Mature spread | 0.6 m |
| Spacing | 0.4 m |
| Years to maturity | 2 |
| Bloom | Jul–Aug |
| Flower colour | Yellow read from a published flora |
| In bloom | July August |
| Native to | AB, SK |
egg-shaped leaves about 10 cm long in opposite pairs
Where it has been recorded
Which ecoregions the records fall in
- Western Alberta Upland central AB: 55 records, high confidence
- Aspen Parkland central AB / SK: 26 records, high confidence
- Eastern Continental Ranges central AB: 23 records, high confidence
- Boreal Transition central AB / SK: 21 records, high confidence
- Mid-Boreal Uplands central AB / SK: 14 records, medium confidence
- Northern Continental Divide south AB: 13 records, medium confidence
- Peace Lowland north AB: 12 records, medium confidence
- Moist Mixed Grassland south AB / SK: 5 records, low confidence
- Northern Alberta Uplands north AB: 3 records, low confidence
- Slave River Lowland north AB: 3 records, low confidence
- Western Boreal central AB: 3 records, low confidence
These are counts of records collected somewhere in the region, which is the resolution of the evidence: the map above shows where inside it. A region with 3 records is not the same claim as one with three hundred, so the count travels with the region. A region missing from this list means nobody has recorded it there, which is not the same as the plant being absent. Records within 900 m of a border count for neither side, because the border is not drawn finely enough to say which one they are on. Source: GBIF occurrence search + PRESERVED_SPECIMEN pass, retrieved 2026-08-24. Boundaries digitised from the National Ecological Framework for Canada v2.2 (Ecological Stratification Working Group 1995), simplified to about 900 m for display: an outline is accurate to roughly a kilometre, not to the metre. How these counts are made.
See every observation, live and current, on GBIF or iNaturalist.
Documented animals
12 documented relationships.
nectar for
- Brown-tailed Bumble Bee Specimen records from www.bumblebeewatch.org
- Central Bumble Bee Specimen records from www.bumblebeewatch.org
- Confusing Bumble Bee Specimen records from iNaturalist.org
- Hunt's Bumble Bee Specimen records from www.bumblebeewatch.org
- Indiscriminate Cuckoo Bumble Bee Specimen records from www.bumblebeewatch.org
- Limenitis lorquini Specimen records from iNaturalist.org
- Nevada Bumble Bee Specimen records from www.bumblebeewatch.org
- Polygonia gracilis Specimen records from iNaturalist.org
- Red-belted Bumble Bee Specimen records from www.bumblebeewatch.org
- Red-tailed Bumble Bee Specimen records from www.bumblebeewatch.org
- Tharsalea editha Specimen records from iNaturalist.org
- Two-ranked Bumble Bee Specimen records from www.bumblebeewatch.org
Also worth knowing
Safety
Toxicity not assessed, absence of a warning is not a guarantee of safety
Buying it
About $8–$16 per plant (estimate), usually from a native-plant nursery. Estimate (herb default); AB retail as of 2026
Where these numbers came from
- Flower detail: not verified, a genus-level estimate