I purchased this because I found 2 species were planted in a single pot (lucky me)The Begonia Jolly Silver and the green version together.
It appears to be robust compared to the rest.I had also managed to set the green version together here of which I'm yet to discover its ID
My joy short-lasting as to discover both are actually the same plant
but because a portion of it was in shade and another exposed to sun, hence the color difference.
Here in the combination with Silver Limbo,
They do pretty well together.
UPDATED MAY 2020
It had been many months and I find this particular one is quite hardy and doesn't go dormant.
Begonia Common Names and Images
Here is the link where I had put together a list of all the begonias that I had come across. A database of all the different types & their characteristics. Please click on the link on the title above for the post.