Begonia koksunii is a new-to-the-scene species from humid Malaysian rainforests. As can be seen, it bears heart shaped leaves of blue-ish green boldly painted in silver-white.It does best as a terrarium specimen. I've grown it well when nestled between a few limestone chunks with an otherwise traditional terrarium mix. Or, simply be sure you're watering with water that's on the neutral (non-acid) side.
View Terrarium / Begonia Culture Sheet