Negundo: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 

	tree, up to 12 m tall; NOT [shrub or small tree]
	leaves pinnate with 3-5 leaflets; NOT [leaves merely lobed]
	flowers unisexual, with male and female flowers on separate trees

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. 

	shrubs or trees; NOT [herbs]
	plants NOT climbing
	leaves pinnately compound; NOT [leaves simple]
	leaflets mostly 3-5; NOT [leaflets mostly 5-11]
	flowers NOT in catkins or aments; NOT [male flowers, at least, in catkins or aments]
	flowers with only one floral ring, with sepals but not petals
	fruit without a feathery style; NOT [fruit with a persistent feathery style]
	fruit a double samara; NOT [fruit a single samara]