Begonia tonkinensis

Begonia tonkinensis is a plant species in the family Begoniaceae. The species is part of the section "Diploclinium". It was described in 1919 by François Gagnepain.
Description.
The Vietnamese name is Thu hải đường bắc bộ. It is a vascular plant, "commonly upright-stemmed, rhizomatous, or tuberous".
Distribution.
This species is native to Vietnam. 
External links.
"Begonia" "tonkinensis" Gagnep.