Jacarandas are grown widely in warm parts of the world and in greenhouses for their showy blue or violet flowers and attractive, oppositely paired, compound leaves. The genus includes about 50 species. The name is also applied to several tree species of the genera Machaerium and Dalbergia in the pea family (see legume), the sources of commercial rosewood. The blue flowers of the Jacaranda tree adorn the streets of many African cities, such as: Pretoria – the Jacaranda City. Jacaranda mimosifolia are spectacular late spring flowering trees,