Streptocarpus ‘Epupa Falls’ is a registered hybrid created by Jaco Truter. It is a cross of S. caulescens and S. pallidiflorus. There do not seem to be any available photos of this hybrid, but it is described as having flowers 1.5 cm across, colored rose pink with deeper veining.
The plant featured above is a seedling from a selfing of ‘Epupa Falls’. The flowers are very like those of the parent S. pallidiflorus.
The whole plant of the seedling can be seen here.