With around 1,500 species, Begonia is the sixth largest genera of flowering plants. The American Begonia Society classifies begonias into several major groups: cane-like, shrub-like, tuberous, rhizomatous, semperflorens (or wax begonias), rex, trailing-scandent, thick-stemmed.
Reiger Begonias are a hybrid cross between tuberous and wax Begonias. They are not known in truly wild environment. Reiger Begonias produce beautiful ‘rose-like’ blooms in bright yellows, reds, pinks, and even white.
The Rieger begonia is also known as hiemalis begonia. The original plant was a cross between a standard wax begonia and a tuberous begonia and has since evolved into a thriving category of its own. They are also sometimes called elatior begonias.
Today, the flower variety is achieved by crossing existing hybrids with each other and standardizing for color.