This particular Begonia heracleifolia is known for the large Mexican rhizomatous species. Firstly identified in 1830 in few Begonia Societies and hence many varieties and hybrids been discovered and created - however they all are generally labelled as a Star Begonia with a general Begonia heracleifolia species name.
The Main Characteristics here I want to emphasise is more of the Glossy Green Foliage which is slightly more grander in appearance than Begonia heracleifolia Cham. & Schltdl. as that one has more yellow tones.