Thick cane/stalk.

Zoomed in on the blooms and top leaves.

That is pretty impressive! the huge leaves and canes certainly look tropical. Looks like the flowers are rather small in comparison though.

That is the weird thing about begonias. Seems like the ones with the biggest leaves have the smallest blooms (but tons of blooms though) and the ones with smaller leaves have the bigger blooms. Crazy!

Here is an example of a small cane with big blooms. I don't know the name of this cane - thinking Fabulous Tom or Tom Ment.