Begonia retinerviaBegonia retinervia, also known as , is a species of Begonia endemic to the Guangxi region of China.Distribution and habitatBegonia retinervia is known only from north-central Guangxi in southern China, where it grows on limestone slopes and inside damp limestone caves at altitudes of.DescriptionThis species has near black leaves with protruding veining. Its leaves are finely hairy and its flowers are whitish to pinkish in color.EcologyBegonia retinervia flowers from August to October and fruits from November to March of the following year. It is considered rare within its range.