This flower does look a lot like a member of the Erythrina genus but I am not sure which species it is exactly. I can rule out Caffra, Crista-galli and lysestimon. At any rate the picture is beautiful.
Most of the he pictures in this blog are images that are listed in Flickr under the "Creative Commons" license for non-commercial use. All of the images are linked to their original Flickr pages where more information and comments can be found. There are also links to the photographers profile page on Flickr.