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合欢为豆科合欢属植物,树冠开阔,入夏绿荫清幽,羽状复叶昼开夜合,异常清奇。夏日粉红色绒花吐艳,十分美丽,是我国热带、温带著名的观赏绿荫树和行道树。形态特征和生物学特性合欢为落叶乔木。树冠广伞形,树皮灰棕色,平滑。偶数羽状复叶,互生,各具10对~40对镰刀小叶,全缘。头状花序簇生叶腋或花密集于小枝先端,呈伞房状,淡红色。荚果条形,扁平。原产中国和日本,喜温暖湿润和阳光充足的环境。适应性强,耐干旱、瘠薄,不耐水涝,萌芽力差,不耐修
Acacia beans for Acacia, open crown, into the summer quiet shade, feather-shaped compound leaves open day and night, exceptionally strange. Summer pink velvet Tuyan, very beautiful, is our tropical, temperate famous ornamental shade trees and street trees. Morphological characteristics and biological characteristics Acacia as deciduous trees. Crown umbrella umbrella, bark beige, smooth. Even pinnate, alternate, each with 10 pairs to 40 pairs of sickle leaflets, entire. Flower heads clustered axillary or flowers densely dendritic tip, was corymbose, pale red. Pods strip, flat. The origin of China and Japan, hi warm and humid and sunny environment. Adaptable, drought-resistant, infertile, impatient with waterlogging, sprout poor, not resistant to repair