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银合欢(Leucana leucocephala)是豆科喜温暖、湿润的木本植物,品种类型很多,有的是分枝众多的灌木,有的是主干明显高20米的大乔木。银合欢原产中美洲,早在一千多年前的雅玛和赛波提克文明时期,墨西哥许多地区已广泛分布。1565年,西班牙征服墨西哥以后,通过商业活动,西班牙的商船将银合欢作为饲料传播到菲律宾、关岛及西太平洋的一些岛屿。以后,人们用银合欢作遮荫或架材种植咖啡、可可、金鸡纳树、胡椒、香草等经济作物,银合欢又被引种到印尼、巴布亚-新几内亚、印度、澳大利亚等热带及部分亚热带地区。
Leucana leucocephala (Leucana leucocephala) is a warm and moist legume woody plant, many types of species, some branches are numerous shrubs, some of which are significantly higher trunk 20 meters tall trees. Acacia originated in Central America, as early as more than a thousand years ago, during the civilizations of Yama and Septiec, Mexico has been widely distributed in many areas. After Spain conquered Mexico in 1565, commercial merchants in Spain spread the Acacia as feedstuffs to some islands in the Philippines, Guam and the western Pacific through commercial activities. Later, people used acacia as shade or timber for planting coffee, cocoa, cinchona, pepper, vanilla and other cash crops. Silver acacia was also introduced to tropical and subtropical regions such as Indonesia, Papua New Guinea, India and Australia .