Acer negundo
 
Manitoba Maple

Leaf Bottom

Nicolle Flats at East End of Buffalo Pound Provincial Park
06-June-2014

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Negundo: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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tree, up to 12 m tall; NOT [shrub or small tree]

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leaves pinnate with 3-5 leaflets; NOT [leaves merely lobed]

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flowers unisexual, with male and female flowers on separate trees

 

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Aceraceae: Answers to key questions in Budd's Flora leading to this family.  Not all the answers apply to all members of this family, but they all do apply to A. negundo
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shrubs or trees; NOT [herbs]

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plants NOT climbing

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leaves pinnately compound; NOT [leaves simple]

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leaflets mostly 3-5; NOT [leaflets mostly 5-11]

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flowers NOT in catkins or aments; NOT [male flowers, at least, in catkins or aments]

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flowers with only one floral ring, with sepals but not petals

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fruit without a feathery style; NOT [fruit with a persistent feathery style]

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fruit a double samara; NOT [fruit a single samara]