Some Southern Thailand Begonias

These Begonias from S. Thailand - Malaysian region have nicely patterned leaves but each species are also quite variable. Most of them are Begonia diversifolia or something similar - this photo was taken at my nursery.

This is likely a form of Begonia integrifolia growing at the rubber estate at the edge of a limestone hill.

Plain leaf form

This is another Begonia, a true lithophyte on limestones  - no idea what it could be though.

These plants will go completely dormant during drier months and wake up again once the rain starts falling. They are a bit tricky to grow as you need to drastically reduce watering when they go dormant or you may lose the whole lot.