Abstract
A subspecies new to science, Begonia bangsamoro subsp. bagasa Naive (section Petermannia) discovered in Zamboanga del Sur, Western Mindanao, Philippines is herewith described and illustrated. The new subspecies differs significantly from the type subspecies in having staminate and pistillate flowers with very narrow tepals. A colour plate, notes on its distribution, habitat, phenology, proposed conservation assessment based on IUCN criteria as well as a checklist of Begonia species present in Zamboanga Peninsula are provided. With this discovery, Zamboanga Peninsula now holds a total of 17 Begonia taxa, and the very first subspecies described for the Philippine archipelago.
References
<p>Ardi, W.H., Chikmawati, T., Witono, J.R. & Thomas, D.C. (2018) A synopsis of <em>Begonia </em>(Begoniaceae) of Southeastern Sulawesi including four new species. <em>Phytotaxa </em>381 (1): 27–50. https://doi.org/10.11646/phytotaxa.381.1.7</p>
<p>Beentje, H.J. (2010) The Kew plant glossary: an illustrated dictionary of plant terms. Royal Botanic Gardens, Kew, 184 pp.</p>
<p>Blume, C.L. (1827) <em>Enumeratio Plantarum Javae et insularum adjacentium minus cognitarum vel novarum ex herbariis Reinwardtii, Kuhlii, Hasseltii et Blumii. </em>Apud J.W. van Leeuwen, Lugduni Batavorum [Leiden]. https://doi.org/10.5962/bhl.title.44901</p>
<p>Buenavista, D.P., Ang, Y.P., Pranada, M.A.K., Salas, D.A., Mollee, E. & McDonald, M. (2021) <em>Begonia bangsamoro</em> (Begoniaceae, section <em>Petermannia</em>), a new species from Mindanao Island, the Philippines. <em>Phytotaxa</em> 497 (1): 39–48. https://doi.org/10.11646/phytotaxa.497.1.4</p>
<p>Cudal, M.G., Calimbo, L.G.L., Sumibay Jr., D., Salise, J., Gomez, J., Pagaling, M., Locson, J., Cahayagan, J., Seno, J. & Daculio, J.N. (2021) Diversity of Pteridophytes in Mount Timolan Protected Landscape, Zamboanga del Sur, Philippines. <em>Journal of Tropical Life Science</em> 11: 161–170. https://doi.org/10.11594/jtls.11.02.05</p>
<p>Hall, R. (1996) Reconstructing Cenozoic SE Asia.<em> In: </em>Hall, R. & Blundell, D. (eds.) <em>Tectonic Evolution of Southeast Asia 1. </em>Geological Society of London, London, pp. 153–184.</p>
<p>Hall, R. (1998) The plate tectonics of Cenozoic SE Asia and the distribution of land and sea.<em> In: </em>Hall, R. & Holloway, J.D. (eds.) <em>Biogeography and Evolution of SE Asia</em>. Backhuys Publisher, Leiden, pp. 99–131.</p>
<p>Hamilton, C.W. & Reichard, S.H. (1992) Current practice in the use of subspecies, variety, and forma in the classification of wild plants. <em>Taxon</em> 41: 485–498. https://doi.org/10.2307/1222819</p>
<p>Hughes, M., Moonlight, P.W., Jara-Muñoz, A., Tebbitt, M.C., Wilson, H.P. & Pullan, M. (2015–) Begonia Resource Centre. Available from: http://padme.rbge.org.uk/begonia/ (accessed 10 February 2022)</p>
<p>IUCN Standards and Petitions Subcommittee. (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 15 February 2022)</p>
<p>Klotzsch, J.F. (1854) 2. Marz. Gesammtsitzung der akademie.<em> In: Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich Preussischen Akademie der Wissenschaften zu Berlin.</em> pp. 119–128.</p>
<p>Mazo, K.R., Aribal, L.G., Bustamante, R.A.A. & Ang, Y.P. (2021) <em>Begonia tinuyopensis </em>(sect. <em>Petermannia</em>, Begoniaceae), a new species from Zamboanga Del Norte, Philippines. <em>Phytotaxa </em>516 (1): 101–107. https://doi.org/10.11646/phytotaxa.516.1.8</p>
<p>Mazo, K.R. & Rubite, R.R. (2022) Two new species of <em>Begonia </em>(section <em>Petermannia</em>, Begoniaceae) from the Zamboanga Peninsula, Philippines, and a redescription of <em>Begonia parvilimba</em>. <em>Phytotaxa </em>538 (2): 163–171. https://doi.org/10.11646/phytotaxa.538.2.9</p>
<p>Merrill, E.D. (1912) New or noteworthy Plants, IX. <em>The Philippine Journal of Science, section C, Botany</em> 7 (5): 308. Available from: https://www.biodiversitylibrary.org/item/209654 (accessed 10 March 2022)</p>
<p>Merrill, E.D. (1925) Additions to our knowledge of Philippine flora, I. <em>The Philippine Journal of Science</em> 26 (4): 478–481.</p>
<p>Naive, M.A.K., Mazo, K.R.F. & Hughes, M. (2022) Taxonomy of the genus <em>Begonia</em> (Begoniaceae) in Mindanao, Philippines II: Lectotypification of two <em>Begonia</em> section <em>Petermannia</em> species from Zamboanga Peninsula. <em>Kew Bulletin</em> 77: 139–146. https://doi.org/10.1007/s12225-022-10008-5</p>
<p>Rubite, R.R.R. (2013) <em>Begonia</em> section <em>Petermannia</em> of Luzon Island, The Philippines. <em>Philippine Journal of Science </em>142: 183–197.</p>
<p>Thiers, B.M. (2022) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 14 February 2022)</p>
<p>Viernes-Enriquez, J. (1990) A legend of the Subanen “Buklog”. <em>Asian Folklore Studies</em> 49: 109–123. https://doi.org/10.2307/1177951</p>
<p>Yumul, G.P., Dimalanta, C.B., Tamayo, R.A., Maury, R.C., Bellon, H., Polve, M., Maglambayan, V.B., Querubin, C.L. & Cotten, J. (2004) Geology of the Zamboanga Peninsula, Mindanao, Philippines: an enigmatic South China continental fragment? <em>Geological Society, London, Special Publications </em>226: 289–312. https://doi.org/10.1144/GSL.SP.2004.226.01.16</p>
<p>Beentje, H.J. (2010) The Kew plant glossary: an illustrated dictionary of plant terms. Royal Botanic Gardens, Kew, 184 pp.</p>
<p>Blume, C.L. (1827) <em>Enumeratio Plantarum Javae et insularum adjacentium minus cognitarum vel novarum ex herbariis Reinwardtii, Kuhlii, Hasseltii et Blumii. </em>Apud J.W. van Leeuwen, Lugduni Batavorum [Leiden]. https://doi.org/10.5962/bhl.title.44901</p>
<p>Buenavista, D.P., Ang, Y.P., Pranada, M.A.K., Salas, D.A., Mollee, E. & McDonald, M. (2021) <em>Begonia bangsamoro</em> (Begoniaceae, section <em>Petermannia</em>), a new species from Mindanao Island, the Philippines. <em>Phytotaxa</em> 497 (1): 39–48. https://doi.org/10.11646/phytotaxa.497.1.4</p>
<p>Cudal, M.G., Calimbo, L.G.L., Sumibay Jr., D., Salise, J., Gomez, J., Pagaling, M., Locson, J., Cahayagan, J., Seno, J. & Daculio, J.N. (2021) Diversity of Pteridophytes in Mount Timolan Protected Landscape, Zamboanga del Sur, Philippines. <em>Journal of Tropical Life Science</em> 11: 161–170. https://doi.org/10.11594/jtls.11.02.05</p>
<p>Hall, R. (1996) Reconstructing Cenozoic SE Asia.<em> In: </em>Hall, R. & Blundell, D. (eds.) <em>Tectonic Evolution of Southeast Asia 1. </em>Geological Society of London, London, pp. 153–184.</p>
<p>Hall, R. (1998) The plate tectonics of Cenozoic SE Asia and the distribution of land and sea.<em> In: </em>Hall, R. & Holloway, J.D. (eds.) <em>Biogeography and Evolution of SE Asia</em>. Backhuys Publisher, Leiden, pp. 99–131.</p>
<p>Hamilton, C.W. & Reichard, S.H. (1992) Current practice in the use of subspecies, variety, and forma in the classification of wild plants. <em>Taxon</em> 41: 485–498. https://doi.org/10.2307/1222819</p>
<p>Hughes, M., Moonlight, P.W., Jara-Muñoz, A., Tebbitt, M.C., Wilson, H.P. & Pullan, M. (2015–) Begonia Resource Centre. Available from: http://padme.rbge.org.uk/begonia/ (accessed 10 February 2022)</p>
<p>IUCN Standards and Petitions Subcommittee. (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 15 February 2022)</p>
<p>Klotzsch, J.F. (1854) 2. Marz. Gesammtsitzung der akademie.<em> In: Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich Preussischen Akademie der Wissenschaften zu Berlin.</em> pp. 119–128.</p>
<p>Mazo, K.R., Aribal, L.G., Bustamante, R.A.A. & Ang, Y.P. (2021) <em>Begonia tinuyopensis </em>(sect. <em>Petermannia</em>, Begoniaceae), a new species from Zamboanga Del Norte, Philippines. <em>Phytotaxa </em>516 (1): 101–107. https://doi.org/10.11646/phytotaxa.516.1.8</p>
<p>Mazo, K.R. & Rubite, R.R. (2022) Two new species of <em>Begonia </em>(section <em>Petermannia</em>, Begoniaceae) from the Zamboanga Peninsula, Philippines, and a redescription of <em>Begonia parvilimba</em>. <em>Phytotaxa </em>538 (2): 163–171. https://doi.org/10.11646/phytotaxa.538.2.9</p>
<p>Merrill, E.D. (1912) New or noteworthy Plants, IX. <em>The Philippine Journal of Science, section C, Botany</em> 7 (5): 308. Available from: https://www.biodiversitylibrary.org/item/209654 (accessed 10 March 2022)</p>
<p>Merrill, E.D. (1925) Additions to our knowledge of Philippine flora, I. <em>The Philippine Journal of Science</em> 26 (4): 478–481.</p>
<p>Naive, M.A.K., Mazo, K.R.F. & Hughes, M. (2022) Taxonomy of the genus <em>Begonia</em> (Begoniaceae) in Mindanao, Philippines II: Lectotypification of two <em>Begonia</em> section <em>Petermannia</em> species from Zamboanga Peninsula. <em>Kew Bulletin</em> 77: 139–146. https://doi.org/10.1007/s12225-022-10008-5</p>
<p>Rubite, R.R.R. (2013) <em>Begonia</em> section <em>Petermannia</em> of Luzon Island, The Philippines. <em>Philippine Journal of Science </em>142: 183–197.</p>
<p>Thiers, B.M. (2022) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 14 February 2022)</p>
<p>Viernes-Enriquez, J. (1990) A legend of the Subanen “Buklog”. <em>Asian Folklore Studies</em> 49: 109–123. https://doi.org/10.2307/1177951</p>
<p>Yumul, G.P., Dimalanta, C.B., Tamayo, R.A., Maury, R.C., Bellon, H., Polve, M., Maglambayan, V.B., Querubin, C.L. & Cotten, J. (2004) Geology of the Zamboanga Peninsula, Mindanao, Philippines: an enigmatic South China continental fragment? <em>Geological Society, London, Special Publications </em>226: 289–312. https://doi.org/10.1144/GSL.SP.2004.226.01.16</p>