I always have a penchant for Rex Begonias and I appreciate this uncommon Begonia for its silverish-pink leaves and reddish underside.
I found many links on the cultorum group and they are as attached:
- http://toptropicals.com/cgi-bin/garden_catalog/cat.cgi?number=5&find=Begoniaceae&imagesonly=1
- http://toptropicals.com/catalog/uid/Begonia_Rex.htm
- http://www.scottishbegoniasociety.co.uk/15.html
- http://www.begonias.org/greenhouse/rex.htm
- http://www.rhs.org.uk/Plants/RHS-Publications/Plant-bulletins/Begonia-Rex-Cultorum-Group-Bulletin