Albizia lebbek, widely known by its Hindi name, siris, is a medium-sized deciduous tree native to the Indian subcontinent and Myanmar (Burma). It is cultivated and has become naturalized well beyond its native range, including in many countries from Southeast Asia to Australia, in western Asia, northern and West Africa, throughout the Caribbean, in Central America and in northern and eastern South America. It grows to a height of 18 to 25 m on good sites, with a spreading crown of thin foliage, finely fissured bark, and attractive, fragrant, greenish-yellow flowers. It is valued for its timber, as an ornamental and roadside tree, and as a source of shade and fodder in agroforestry and silvopastoral systems. Its rapid early growth, excellent coppicing ability, site adaptability, and nitrogenfixing capacity have made it a popular species for reforestation of degraded sites, fuelwood plantations and agroforestry systems in Asia, West Africa and tropical America.