Begonia convolvulacea A.DC.

Stems green, fleshy, flushed red at joints. Leaves roundish, long-pointed, to 8 cm long, upper surface shiny, mid-green, hairless; pale green below, hairless with pronounced veins; margins toothed and pointed at nerve ends. Flowers white, small.

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.