Begonia hatacoaBegonia hatacoa is a species of flowering plant in the family Begoniaceae, native to Tibet, Nepal, the eastern Himalayas, Assam, Bangladesh, Myanmar, Thailand, and Vietnam. Its best-known cultivar is 'Silver'.SubtaxaThe following varieties are accepted:Begonia hatacoa var. hatacoaBegonia hatacoa var. meisneri Golding – Assam