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Sign: The Hebrew University of Jerusalem - Discovery Tree Walk - Oriental Plane

Givat Ram, Jerusalem, Israel
Click here for a map that contains other items in the area

On the sign:
דולב מזרחי
Platanus orientalis

תפוצה טבעית: דרום-מערב אסיה, צפון]מערב אפריקה, המזרח התיכון, ישראל

הדולב הינו אחד העצים הגדולים בישראל. הוא מתהדר בתפרחות ובפירות כדוריים, ובקליפה משוישת. עליו, שצורתם כצורת כף יד, נושרים בחורף. ארבעה מינים נוספים של הדולב, ה-sycamores (מהמילה העברית שקמה), מוצאם בצפון אמריקה.

[הפאה השנייה של הקוביה]
[The second face of the cube]
Oriental Plane
Platanus orientalis

Natural range: S.W. Asia, Middle East, N.W. Africa, Israel

One of Israel’s largest native trees, its special features include ball-like floral and fruit clusters, and the mottled bark. Hand-shaped leaves drop in winter. The four other Platanus species, all North American, are called sycamores.

[הפאה השלישית של הקוביה]
[The third face of the cube]
כמה צבעים אתה רואה בקליפה המתקלפת? מדוע לדעתך היא מתקלפת?

[a question]
How many different colors can you find in this tree’s irregularly peeling bark? Why think it peels?

[הפאה הרביעית של הקוביה]
[The fourth face of the cube]
[התשובה לשאלה]
ברוב העצים גזעי העצים גדלים בעובי, והקליפה גדלה איתם ונסדקת. בעץ שלפנינו המצב שונה: שכבת הקליפה החדשה, הצבעונית, צומחת מתחת לקליפה הישנה וכאשר הקליפה הישנה ניתקת ונושרת מתגלה השכבה החדשה.

[The Answer to the question]
As a tree’s trunk grows thicker, generally its outer bark cracks and grows to continue covering it. But not in this species; new, expanded bark layers (of different colors) grow underneath the old bark, which then peels away.
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Tree No. 10 in the Mac and Tibby Podel Discovery Tree Walk, located on the Edmond J. Safra Campus of the Hebrew University of Givat Ram.

Each tree is accompanied by a cube with details on the tree. On the top of which is the text:
Mac and Tibby Podel Discovery Tree Walk Click for a larger image

In the next picture taken from one of the trees on the route, you can see the way the sign is placed (a cube standing on a metal pillar) and the tree to which it points Click for a larger image

The tree to which the cube points was photographed that day Click for a larger image

See the bark mentioned in the question Click for a larger image

The rest of the cube faces:
The second face Click for a larger image
The third face Click for a larger image
The fourth face Click for a larger image

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