Description
A tall, fast growing tree, usually 20–25 m (66–82 ft) at maturity, with a trunk 20–80 cm (0.66–2.6 ft) in diameter; records are 36.5 m (120 ft) in height and 1.37 m (4.5 ft) in diameter.
The bark is relatively smooth greenish-white to gray and is marked by thick black horizontal scars and prominent black knots.
The leaves on mature trees are nearly round, 4–8 centimetres (1.6–3.1 in) in diameter with small rounded teeth, and a 3–7 centimetres (1.2–2.8 in) long, flattened petiole. Young trees (including root sprouts) have much larger—10–20 centimetres (3.9–7.9 in) long—nearly triangular leaves.
The flowers are catkins 4–6 centimetres (1.6–2.4 in) long, produced in early spring before the leaves; it is dioecious, with male and female catkins on different trees. The fruit is a 10-centimetre (3.9 in) long pendulous string of 6-millimetre (0.24 in) capsules, each capsule containing about ten minute seeds embedded in cottony fluff, which aids wind dispersal of the seeds when they are mature in early summer.
Read more about this topic: Populus Tremuloides
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