Jacaranda mimosifolia is a sub-tropical tree native to South America that has been widely planted elsewhere because of its beautiful and long-lasting blue flowers. It is also known as Jacaranda, Blue Jacaranda, Black Poui, or as the fern tree. Older sources give it the systematic name Jacaranda acutifolia, but it is nowadays more usually classified as Jacaranda mimosifolia. In scientific usage, the name "Jacaranda" refers to the genus Jacaranda, which has many other members, but in horticultural and everyday usage, it nearly always means the Blue Jacaranda.
The Blue Jacaranda has been cultivated in almost every part of the world where there is no risk of frost; established trees can however tolerate brief spells of temperatures down to around 7°C . In the United States, it grows in parts of Oregon, California, Nevada, Arizona, Texas, and Florida, the Mediterranean coast of Spain, in southern Portugal (very noticeably in Lisbon), southern Italy (in Naples and Cagliari it's quite easy to come across beautiful specimens). It was introduced to Cape Town by Baron von Ludwig in about 1829. It is regarded as an invasive species in parts of South Africa and Queensland, Australia, the latter of which has had problems with the Blue Jacaranda preventing growth of native species. Lusaka, the capital of Zambia also sees the growth of many Jacarandas.