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Sign: The Hebrew University of Jerusalem - Discovery Tree Walk - Black Lombardy Poplar

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

On the sign:
צפצפה שחורה, זן איטלקי
Populus nigra, var.italica

(ממוצא תרבות ללא תפוצה טבעית)

גננים מצאו זן צר זה של הצפצפה הזאת בלומברדיה שבאיטליה לפני כ-250 שנה. זן זה תמיד ממין זכר (חסר זרעים). בשל כך הרבייה תלויה באדם ונעשית ע"י נטיעת ייחורים.

[הפאה השנייה של הקוביה]
[The second face of the cube]
Black Lombardy Poplar
Populus nigra, var. italica

Natural range: (Cultivated variety, with no natural range)

Gardeners found this narrow mutant variety of poplar in Lombardy, Italy, some 250 years ago. All trees of this variety are males. As male trees cannot produce seeds, their reproduction relies on people to make cuttings and plant them.

[הפאה השלישית של הקוביה]
[The third face of the cube]
איזה תכונה של ענפי עץ זה "אחראית" לצורתו הצרה? האם תוכל לראות ממקום עמידתך עץ צר נוסף? האם גם לענפיו אותה תכונה?

[a question]
What structural feature of the branches makes this tree so narrow? What other type of tree can you see from here that is also very narrow? Does it have the same structural feature?

[הפאה הרביעית של הקוביה]
[The fourth face of the cube]
[התשובה לשאלה]
הענפים צומחים בזוית חדה כלפי מעלה ולכן צורתו הצרה של העץ. תופעה זו משותפת גם לעץ הברוש המצוי הבולט מעבר לשביל המפותל

[The Answer to the question]
This tree’s branches are angled sharply upward, making the whole tree narrow. This also explains the narrow shape of the Italian cypress, prominently visible beyond this curved path.
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Tree No. 26 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

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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