Begonia elegantifolia (Begoniaceae), a new species from northern Sumatra, Indonesia

Key Points

• Begonia elegantifolia is a newly discovered species from northern Sumatra, distinguished by its unique floral characteristics.
• This new species features narrowly lanceolate leaves and six tepals in its flowers, unlike any other known species.
• It represents the first member of section Platycentrum to have staminate flowers with this six-tepal structure.
• The detailed description includes key identification features and photographs to aid recognition of the species.