Research Paper

Begonia mabuhayensis (section Baryandra, Begoniaceae), a new species from Surigao del Sur, Philippines

Freddie A. Blasco, Grecebio Jonathan D. Alejandro, Rosario R. Rubite

Published on: 07 August 2025

Page: 591 - 594

DOI: 10.6165/tai.2025.70.591

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    Abstract

    Begonia mabuhayensis is described as a new species endemic to the Philippines from the multi-layered rocky floors of Mount Egang, Mabuhay, Tandag, Surigao del Sur. B. mabuhayensis closely resembles B. amparoae in having thick rhizomatous stems, stipules with aristate apex, thick and fleshy lamina, curved petioles, 4-tepaled staminate and pistillate flowers, ovary with unequal wings and nodding capsules, but differs in having shorter rhizome, glabrous oblong stipule with longer arista (vs. puberulous, triangular with shorter arista), ovate leaf (vs. broadly ovate), and capsule with orbicular wings and cordate apex (vs. angular and truncate). Following the IUCN criteria, the authors recommend B. mabuhayensis as Data Deficient (DD).

    Keyword: Begonia amparoae, Begonia tanauanensis, lithophytic, Mindanao Island, Surigao provinces

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