September 24, 2025

Taxonomic studies on Begonia (Begoniaceae) in Myanmar Ⅳ: a new species, two new records, and two lectotypifications

Puntos clave

A new species, begonia hpaanensis, is identified based on distinctive morphological traits, including its tuberous habit.
This study also documents two new records of begonia species in Myanmar, contributing to local biodiversity knowledge.
Lectotypes are designated for two species to ensure accurate identification and classification in the begonia family.
The findings enhance the understanding of begonia taxonomy and diversity within Myanmar's unique ecosystems.

Resumen

Begonia hpaanensis, a new species from Kayin State, Myanmar, is described and illustrated herein. Based on its diagnostic morphological traits, including tuberous habit, subsymmetric leaves, a bilocular ovary with axillary placentation, two placental branches per locule, and bifid styles, this new species is placed in Begonia sect. Lauchea (Klotzsch) A.DC. Furthermore, two species are newly recorded in Myanmar and documented herein: B. saxifragifolia Craib (sect. Diploclinium (Lindl.) A.DC.) and B. phutthaii M.Hughes (sect. Apterobegonia Warb.). In addition, lectotypes are formally designated for B. adenopoda Lem. (sect. Lauchea) and B. saxifragifolia as part of this taxonomic study.

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