请输入您要查询的百科知识:

 

词条 white birch
释义
white birch
tree group
any of several species of ornamental and timber trees of the genus Betula, in the family Betulaceae. The trees are native to cool regions of the Northern Hemisphere and have white, peeling bark. The name white birch also refers to paper birch.
One species of white birch, B. pubescens, is a tree about 18 m (60 feet) tall and is native to Eurasia. It has egg-shaped leaves, usually hairy below. The soft, yellowish- or reddish-white wood is commercially important in construction and in the manufacture of vehicles, furniture, and small articles such as spoons and snowshoes.
The European white birch (B. pendula, sometimes erroneously called B. alba), also known as silver birch or common birch, has slender, drooping branches and small, sharp-pointed leaves about 6 cm (2 inches) long. It may grow to a height of 15 m on light soils. The cut-leaved, purple-leaved, and weeping birches are popular ornamental varieties of European white birch.
The Japanese white birch (B. platyphylla japonica), an 18-metre tree native to eastern Asia, has broad leaves about 7 cm long; its hard, yellow-white wood is used for furniture and woodenware.
随便看

 

百科全书收录100133条中英文百科知识,基本涵盖了大多数领域的百科知识,是一部内容开放、自由的电子版百科全书。

 

Copyright © 2004-2023 Newdu.com All Rights Reserved
更新时间:2025/2/19 16:54:04