Begonia balangcodiae sp. nov. from northern Luzon, the Philippines and its natural hybrid with B. crispipila, B. × kapangan nothosp. nov., the first report of natural hybridization in sect. Petermannia

Begonia balangcodiae sp. nov. from northern Luzon, the Philippines and its natural hybrid with B. crispipila, B. × kapangan nothosp. nov., the first report of natural hybridization in Begonia sect. Petermannia产自菲律宾吕宋北部的秋海棠新种Begonia balangcodiae sp. nov.，及其与卷毛秋海棠（B. crispipila）的天然杂交种B. × kapangan nothosp. nov.，此为秋海棠属Petermannia组（Begonia sect. Petermannia）中天然杂交现象的首次报道。