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Erythrina crista-galli
Tree
Not native to South Africa, but cultivated/planted all over the globe.
http://www.fotocommunity.de/pc/pc/displa...
http://www.htbg.com/Leguminosae/LEGU-13-...
http://www.shutterstock.com/pic-789208/s...
http://waynesword.palomar.edu/coraltr1.h...
http://blog.zhaw.ch/n_exterior/
Please, verify and check yourself. You might ask a local gardener for confirmation. ID with non-native and cultivated trees and plant might be tricky.