Perhaps the plant is mislabeled? It looks to me exactly like B. 'Tiger star'
i found the following description in the patent B. 'Stardust' - but then may be 'Star Dust' and 'Stardust'
is not the same?
i don't see any 'purple-red' in my picture, except may be brown splotches are described like that?
http://www.freepatentsonline.c...
A new and distinct form of Begonia plant characterized by rex type leaves with swirling leaf bases, leaves that show a subtle splatter pattern overall, leaves colored celadon green on outer half of leaf and purple red in center half, and edged in purple red in the warm temperatures, leaves colored rose red in center 2/3 and edges with a band of silver between in the colder temperatures, a dense, bushy habit, medium pink flowers in winter, and excellent vigor.