Begonia bowerae Ziesenh.

Leaves ovate, 3-4 cm long, bright green with black splashes on the edges; margins wavy, toothed, with curled white hairs. Flowers small, pink, few per cluster. a parent of many hybrids.

Mexico

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.

Begonia bowerae 'Nigramarga'

Leaves to 6 cm long, surface green with scattered, green-black marks; margins irregularly toothed, wavy, hairs white. Flowers small, white to pale pink, profuse.

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