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合欢,别名夜合花、马缨花、绒花树、扁担树、蠲忿树。豆科合欢属,落叶乔本或小灌木。花期6～8月,先白后黄;果期9～10月,种子小,扁椭圆形。喜温暖、湿润、肥沃和排水性良好的向阳环境,也耐干旱、脊薄和严寒。具根瘤菌,有改良土壤的功效。浅根性,萌芽力不强,不耐修剪。
Acacia, alias night clitoral, Lantana flowers, cashmere tree, pole of the tree, 蠲 off tree. Legumes, deciduous trees or shrubs. Flowering from June to August, first white after yellow; fruit from September to October, the seed is small, oblate. Hi warm, moist, fertile and draining good sunny environment, but also resistant to drought, ridges and cold. Rhizobium, has the effect of improving the soil. Shallow root, sprout is not strong, intolerance pruning.