Begonia 'U681' is a species that is thought to be from the Kunming, Yunnan area of China. It's a relatively easy plant to grow and propagate. It does have a bit of a crawling habit, but it also responds well to being pinched - which will make it bushier over time. It can also top out at around 12-20” tall.
These are young but husky plants, currently in 2 1/2" pots.