Running Begonia

This was such a meager little plant when I got it...but look at it now...it's even doing a whole lot better than the others I got at the same time.  There was a label on the pot saying running begonia...no other info...never heard of it before and even the gal at the cashier didn't know what it meant.  This picture was taken a couple days ago and now it has even more blooms on it!  It is such a pretty little thing...kind of reminds me of the Ugly Duckling!