Begonia of the Fortnight

I forgot to post one last week.

The Begoniaceae family probably has the greatest variety of leaf shape, size, patterning and texture of any plant family, but even plain green can be dramatic. This rhizomatous hybrid, B. 'Oliver Twist', is a lovely shade of (what?) forest green? emerald green? I need a list of all the shades of green. It has a few very dark green, almost black, streaks here and there, which don't show up in the picture. I love the helix and the frilly edges...reminds me of a petticoat.