Begonia nelumbiifolia Cham. & Schltdl.

Leaves large to 45 cm long, almost orbicular, peltate, green; margin with short points, toothed, hairy; stalks tubular, long, slightly hairy. Flowers numerous, white to pale pink.

Mexico to Columbia

Source: Wright, P.; Goodwin, J.; Spencer, R. (1997). Begoniaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.

Distribution map
kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Rosanae
order      Cucurbitales
family       Begoniaceae
genus        Begonia L.