A man rides under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

A car runs under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

People walk under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

Jacaranda trees blossom in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

A man walks under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

Cars run under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

Cars run under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

A man rides under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)

People walk under the jacaranda trees in Pretoria, South Africa, Oct. 16, 2013. Purple flowers of Jacaranda blossom vigorously in Pretoria. (Xinhua/Zhang Chuanshi)