Thinleaf Alder

• Aspen Parkland central AB / SK: 43 records, high confidence
• Mid-Boreal Uplands central AB / SK: 36 records, high confidence
• Western Alberta Upland central AB: 22 records, high confidence
• Boreal Transition central AB / SK: 9 records, medium confidence
• Eastern Continental Ranges central AB: 6 records, low confidence
• Peace Lowland north AB: 6 records, low confidence
• Northern Continental Divide south AB: 5 records, low confidence
• Athabasca Plain north AB / SK: 4 records, low confidence
• Slave River Lowland north AB: 4 records, low confidence
• Tazin Lake Upland north AB / SK: 4 records, low confidence
• Wabasca Lowland north AB: 4 records, low confidence
• Fescue Grassland south AB: 3 records, low confidence
• Hay River Lowland north AB: 3 records, low confidence
• Moist Mixed Grassland south AB / SK: 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.