There are approximately 99 accepted species in the legume tree genus Albizia, the silk trees, sirises, or albizias.[1]
Numerous species placed in Albizia by early authors were eventually moved to other genera, particularly Archidendron and many other Ingeae, as well as certain Acacieae, Mimoseae, and even Caesalpinioideae and Faboideae.[2]
The delimitation of Falcataria and Pithecellobium - close relatives of Albizia - is notoriously complex, with species having been moved between the genera time and again, and probably will continue to do so. Other closely related genera like Chloroleucon and Samanea are often merged with Albizia entirely.[2]