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American Sycamore

Platanus occidentalis

American Sycamore

Quick Facts

Deciduous or Evergreen?

Deciduous

Avg Height'

Avg Diameter"

90

48

Rarity

Family

Platanaceae

Growing Zone

In Arboretum?

4 - 9

Yes

Help

What's this?

This tree is best known for its light grey, green, and brown mottled bark, which easily flakes away. The sycamore is unique for its ability to intentionally shed bark to aid growth, an uncommon trait in most trees. The easiest way to identify an American Sycamore is by spotting this interesting bark year round. In the summer, the sycamore sports a host of green leaves that look similar to a Bigleaf Maple. Most sycamores turn yellow, orange, or brown in the fall, and consequently drop their leaves for the upcoming cold season.

Foliage

One way to tell a sycamore leaf from a maple is to feel the stem. Is it hairy? You’re probably holding a sycamore leaf! Each wide, flat, green leaf has a hairy, almost prickly underside and stem.

Seeds or Cones

Sycamore seeds form in spherical balls, each one composed of hundreds of individual seeds that can be removed by pulling on each rounded end. A popular pastime for many children, stomping on a fallen Sycamore pod will yield an immensely satisfying result, sending each fluffy seed in a different direction. A “ready” seed ball will practically fall apart when touched.

All illustrations by A.S. Longman

Did you know?

These trees are known for fast growth, at an average rate of 2 feet per year!

Download your own QR code here! On a phone, tap and hold to save. On a computer, right click. See the "make a sign" page for detailed instructions on how to make your own sign, and access additional tools!

Information last fact checked by UW Botanic Garden in Spring 2024

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