Begonia sanguinea Raddi

Roots fibrous. Stems erect to 50 cm tall, shiny, red. Leaves ovate, to 17 cm long; upper surface green, fleshy, hairless, glossy dark red below; margins entire. Flowers white, numerous.

Brazil

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.

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