Common Horsetail

• Aspen Parkland central AB / SK: 776 occurrence records, high confidence
• Northern Continental Divide south AB: 371 occurrence records, high confidence
• Eastern Continental Ranges central AB: 346 occurrence records, high confidence
• Fescue Grassland south AB: 299 occurrence records, high confidence
• Western Alberta Upland central AB: 200 occurrence records, high confidence
• Boreal Transition central AB / SK: 185 occurrence records, high confidence
• Mid-Boreal Uplands central AB / SK: 119 occurrence records, high confidence
• Moist Mixed Grassland south AB / SK: 79 occurrence records, high confidence
• Peace Lowland north AB: 77 occurrence records, high confidence
• Cypress Upland south AB / SK: 73 occurrence records, high confidence
• Slave River Lowland north AB: 44 occurrence records, high confidence
• Western Continental Ranges central AB: 24 occurrence records, high confidence
• Mixed Grassland south AB / SK: 22 occurrence records, high confidence
• Wabasca Lowland north AB: 21 occurrence records, high confidence
• Tazin Lake Upland north AB / SK: 14 occurrence records, medium confidence
• Athabasca Plain north AB / SK: 12 occurrence records, medium confidence
• Hay River Lowland north AB: 9 occurrence records, medium confidence
• Western Boreal central AB: 9 occurrence records, medium confidence
• Churchill River Upland north SK: 8 occurrence records, medium confidence
• Clear Hills Upland north AB: 3 occurrence records, low confidence
• Selwyn Lake Upland north SK: 3 occurrence records, low confidence

A range seen three times is not the same claim as one seen three hundred, so the count travels with the region. 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.