Sophora is a genus of about 45 species of small trees and shrubs in the subfamily Faboideae of the pea family Fabaceae. The species are native to southeast Europe, southern Asia, Australasia, the islands of the Pacific Ocean and western South America. The genus formerly had a broader interpretation including many other species now treated in other genera, notably Styphnolobium (pagoda tree genus), which differs in lacking nitrogen fixing bacteria (rhizobia) on the roots, and Calia (the mescalbe… (More on Sophora)