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| Begonia mabuhayensis Blasco, Alejandro & Rubite, in Blasco, Alejandro et Rubite, 2025. |
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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| Begonia mabuhayensis Blasco, Alejandro & Rubite. A. Rhizome, B. Stipule with arising arista, C. Stipule with full grown arista, D. Leaf adaxial surface, E. Leaf abaxial surface, F. Staminate flowers, G. Pistillate flower face view, H. Pistillate flower side view, I. Pistillate buds & mature capsules, J. Mature capsules (drying), K. Cross section of the ovary, L. Dried capsules. All from Freddie A. Blasco 22–006. |
Begonia mabuhayensis Blasco, Alejandro & Rubite sp. nov.
section Baryandra
Diagnosis: Begonia mabuhayensis resembles B. amparoae Blasco, Alejandro, Tandang & Rubite (Fig. S2) in habit, with thick rhizomatous stems, thick and fleshy lamina, 4-tepaled staminate and pistillate flowers, and an ovary with unequal wings. However, it differs in having a shorter rhizome, 6 cm × 1.5–2 cm (vs. longer, 10 cm × 2.5–3 cm); glabrous oblong stipule (vs. puberulous triangular), shorter inflorescence, 57 cm. (vs. 72 cm), shorter peduncle, 49 cm. (vs. 68 cm), and a larger capsule, 20–21mm × 25–26 mm, with orbicular wings, cordate apex and cordate base (vs. 15–17 mm × 17–19 mm, with angular wings, truncate apex and rounded base).
Freddie A. Blasco, Grecebio Jonathan D. Alejandro and Rosario R. Rubite. 2025. Begonia mabuhayensis (section Baryandra, Begoniaceae), A New Species from Surigao del Sur, Philippines. Taiwania. 70(4); 591-594. DOI: 10.6165/tai.2025.70.591 [2025 August 07]
