Sorry, not B. crassicaulis
https://www.begonias.org/begon...

Thank you for noticing my error. What category shall I transfer this to?

I just noticed that I probably based it on RuuddeBlock 's entry of the same leaf and bud photo in the Begonia crassicaulis data base.

It is best in the generic begonia entry.
His is wrong too.
Please don't base plants on other photos, there are many similar looking varieties including named cultivars so without a confirmed label, these are just guesses.

I located the correct category from the internet, Begonia Erythrophylla, Beefsteak Begonia. I've made the transfers, including the blooms that go with it. Hope I now am correct. Again thank you for the accuracy you've directed me towards. Happy and healthy New Year.

Fleur569