The challenge was to create an arrangement using only magnolia branches. This style is called "isshu-ike" (一種生け), "arrangement with only one kind of material".
The leathery leaves have different colours on either side--dark green on one side and orange-brown on the other. This colour difference was used to show contrast.
After the framework had been determined, the leaves were arranged to form a somewhat checkered pattern (市松模様 ichimatsu moyoh).
Here is the whole arrangement.
I hope you like it. --Miyako