Manitoba Maple - Acer negundo

Also known as the Box-elder, this is our only native maple that has divided leaves. These maples only grow to about 20 m but they grow quite quickly. Their range in Ontario is expanding as these maples can grow in a variety of soils and Manitoba Maples are often found in disturbed areas and along rivers and streams. They are known to have rather weak branches that tend to break during severe storms.

Manitoba Maple Bud
Manitoba Maples have round, hariy buds. Photo by Brian Lacey.

Manitoba Maple Lateral Bud
Lateral Bud. Photo by Brian Lacey.

Manitoba Maple Key
Manitoba Maple keys are very important winter food sources for small mammals and birds. Photo by Brian Lacey.

Manitoba Maple Bark
The mature bark is ridged. Photo by Brian Lacey.

Manitoba Maple Flowers
Manitoba Maple flowers. Photo by Brian Lacey.

Manitoba Maple Leaves
Manitoba Maples leaves typically have 5-7 leaflets but can have 3 or 9. Photo by Brian Lacey.

Manitoba Maple Leaves
These leaves only have 3 leaflets. Photo by Brian Lacey.

Manitoba Maple Trees
This maple often has a spralling form with low branches. Photo by Robert Hall.

Ontario Tree Atlas map of non-planted Manitoba Maples. 1995-1999.
Ontario Tree Atlas map of non-planted Manitoba Maples. 1995-1999.

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References

Farrar, J.L.. 1995. Trees in Canada. Fitzhenry & Whiteside Ltd. Toronto. ON. 504 pp.  

Kershaw, L. 2001. Trees in Ontario: Including tall shrubs. Lone Pine Publishing. Edmonton. AB. 240 pp

Muma, W. 2011. Ontario Trees and Shrubs. [Online] Available: www.ontariotrees.com

OMNR, 2011. Ontario Ministry of Natural Resources: Ontario Tree Atlas. [Online] Available: http://www.mnr.gov.on.ca/en/Business/ClimateChange/2ColumnSubPage/267027.html

OMNR, 2008. Ontario’s Biodiversity: Species at Risk.