Birds have sown seeds on my ground and this beautiful flower has sprung. What's the name of this flower?
I live in Sao Paulo, Brazil
It's a type of begonia. With 1800 species in the genus, it's hard to say which it is, but the leaves which seem palmate would place it in the aconitifolia species. Your leaves don't appear to be variegated, and your flower is deeper pink, but it's the same flower species.