Zelkova serrata

Noma keyaki, a 1000 -year-old Japanese zelkova in nose near Osaka, Japan. At 25 meters high and 11.95 meters in circumference, it is the largest known specimen of Zelkova serrata.

The Japanese zelkova ( Zelkova serrata ) (Japanese槻, keyaki, kor neutinamu 느티 나무; Syn. Zelkova acuminata, Zelkova hirta, Zelkova keaki ), also called Keaki, a tree of the genus is zelkova ( Zelkova ) and belongs in the family of the elm family ( Ulmaceae ).


The Japanese zelkova is up to 30, rarely up to 40 meters high. She has a short stem. The bark is initially smooth, later she becomes scaly. The oval to eilänglichen leaves are 10 to 12 inches long and 5 inches wide. They have a reddish stem and possess 9-14 lateral nerves couples that end up in the pointed leaf margin teeth. These are pointed and directed forward. The leaves are colored on the top of light green and slightly hairy on the underside and glossy green. They have a long solid tip and a rounded Spreitenbasis. In the autumn the leaves from yellow -orange to reddish- brown color. The Japanese zelkova blooms from April to May The flowers are monoecious, small and green. The fruit is smooth, round and green, and is up to 5 millimeters in size.


The distribution of Japanese zelkova covers Japan, Korea, eastern China and Taiwan. It occurs only sporadically, but is grown in forestry because of their valuable timber.

In Central Europe, the Japanese zelkova is an ornamental hardy tree park. She is also often designed as a bonsai.

Strong heartwood of Japanese zelkova is an essential part of the Japanese bow making, see Yumi.