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| Begonia trichopetiolata Medecilo, Rubite & Caballes, in Medecilo-Guiang, Rubite, Vallejos, Atay et Caballes, 2026. Illustrated by Julieferd Torres facebook.com: Ferd Torres |
Abstract
Begonia trichopetiolata from Bukidnon, Central Mindanao, is described and illustrated as a new species endemic to the Philippines. It closely resembles B. mabuhayensis from Surigao del Sur, Eastern Mindanao; however, it differs in having triangular, keeled stipules, densely villose petioles, leaves with 10 primary veins and non-repand margin, shorter inflorescences and primary peduncles, larger bracts, and smaller capsules. Following IUCN Red List criteria, we propose B. trichopetiolata as Critically Endangered (CR). This discovery raises the total number of Begonia species in Bukidnon to 14 and marks the third member of Begonia section Baryandra recorded in the province.
Eudicots, Critically endangered, karst forest, limestone, Mindanao, Philippine endemic
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| Begonia trichopetiolata. A. Habit; B. Detail of petiole; C. Leaf abaxial surface; D. Staminate flower bud; E. Staminate flowerfront view; F. Staminate flower lateral view; G. Stamens; H. Anther and filament; I. Pistillate flower front view; J. Pistillate flower lateralview; K. Stigma and style; L. Lateral view of the stipule; M. Anterior view of the stipule; N. Cross section of the ovary; O. Capsule. Illustrated by Julieferd Torres. |
Begonia trichopetiolata Medecilo, Rubite & Caballes sp. nov.
§ Baryandra
Etymology:—The specific epithet trichopetiolata refers to the petioles entirely and densely covered with long white hairs.
Maria Melanie P. MEDECILO-GUIANG, Rosario R. RUBITE, Christian Jay S. VALLEJOS, Jasten Kerk A. ATAY and Ken Bien Mar L. CABALLES. 2026. Begonia trichopetiolata (section Baryandra, Begoniaceae), A New Species from Bukidnon, Central Mindanao, the Philippines. Phytotaxa. 773(2); 162-170. DOI: doi.org/10.11646/phytotaxa.773.2.5 [2026-09-08]
