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红豆树,别名相思豆,属豆科,孔雀豆属,乔木型,慢生,长寿树种,性耐寒,对低温有适应能力。在广东、福建等南方各省,常为绿叶乔木;江苏是我国红豆树分布最北限,为落叶乔木。株高可达20米,干径1米,分权性强,侧枝粗壮,伞状树冠,奇数羽状复叶,小叶5～9片,椭圆状卵形,无毛,4月开圆锥花,白色,蝶形。10月果熟,木质荚果,椭圆形,每荚种子1～2粒,是极为优良的观赏树种,用作古典庭园及开阔草地孤植、合栽、丛栽均可。其种子——红豆,色泽鲜红,光彩夺目,种皮坚硬,不怕虫蛀,存储百年而色泽不变,是各种金银首饰上镶嵌装饰之珍品。江苏,现存红豆古树7棵,分布在常熟、江阴。常熟有5棵,均400余龄。在江阴顾山乡东北的红豆村,院里长着一棵四干同根的红豆树,村由此而得名。1987年列编入《世界奇
Red beans, alias Acacia beans, a family of legumes, peacock genus, arborous, slow-growing, longevity species, sexual cold, have the ability to adapt to low temperatures. In Guangdong, Fujian and other southern provinces, often green leaf trees; Jiangsu is China’s most northern distribution of red beans, deciduous trees. Plant height of up to 20 meters, dry diameter of 1 meters, strong decentralization, collateral robust, umbrella crown, odd pinnate, leaflets 5 to 9, oval-shaped oval, glabrous, April open cone flower, White, butterfly. October fruity, woody pods, oval, per pod 1 to 2 seeds, is a very good ornamental tree species, used as a classical garden and open grassland solitary plant, planted, Cong plant can be. Its seeds - red beans, bright red color, dazzling, hard seed coat, not afraid of moth-eaten, the same color storage for centuries, is a variety of gold and silver jewelry inlaid decorative treasures. Jiangsu, 7 existing red bean trees, located in Changshu, Jiangyin. Changshu has 5, all more than 400 age. In Jiangyin Township, northeast of Hong Dou Village, the courtyard with a dry four-rooted red bean tree, the village hence its name. 1987 column into the "world wonders