Acer negundo (eastern North America)
Habit: Medium-size tree, 10-15 m tall, 5-10 m wide, asymmetrical and broadly round, often with several stems; flattened crown when old; fast-growing, 100-150 cm in the first years, later 40-50 cm a year.
Flowers: Inconspicuous, dioecious.
Leaves: Pinnate, three to five, occasionally seven leaves, light green, yellow-green in autumn, October.
Twigs: Green; glaucous blue.
Roots: Shallow roots, slow-growing, not very sensitive.
Demands: Sun to light shade, growing crooked in deep shade; tolerates warmth, frost hardy; tolerates urban climates; break when old, thus protect from wind.
Soil: Moderately dry to damp, tolerates floods; acidic to slightly alkaline; not demanding, adaptable; on all somewhat nutritious substrates.
Hardiness: Zone 4