Abstract
Two new species of Begonia section Petermannia from Zamboanga del Norte, Philippines are described and illustrated: Begonia amamampang and Begonia turugsoy. Begonia parvilimba was also rediscovered and an updated description is provided. All morphological characters and measurements were observed in the wild from living plants. This brings the record to a total of 16 Begonia species under this section found in the region of Zamboanga Peninsula making Zamboanga a center of diversity of section Petermannia in the Philippines. Notes on their ecology, distribution map and proposed conservation assessment are provided.
References
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<p>Buenavista, P.D., Ang, Y.P., Pranada, M.A.K., Salas, D.S., 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>de Candolle, A. (1859) Mémoire sur la famille des Bégoniacées. [ser. 4.] <em>Annales des Sciences Naturelles; Botanique </em>11: 122–134.</p>
<p>Hughes, M., Moonlight, P., Jara, A., Tebbitt, M. & Pullan, M. (2015–onwards) <em>Begonia</em> Resource Center. Available from: http://padme.rbge.org.uk/begonia/ (accessed 15 February 2021)</p>
<p>IUCN Standards and Petitions Committee (2019) Guidelines for using the IUCN Red List categories and criteria. Ver. 14. Prepared by the Standards and Petitions Committee. Available from: http:// www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 7 March 2022)</p>
<p>Klotzsch, J.F. (1854) <em>Begoniaceen-Gattungen und Arten. Monatsberichte der Königlich preussischen Akademie der Wissenschaften zu Berlin</em> 1854: 119–128.</p>
<p>Klotzsch, J.F. (1855) <em>Begoniaceen-Gattungen und Arten. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin</em> 1855: 121–25</p>
<p>Linnaeus, C. (1753) <em>Species plantarum, exhibentes plantas rite cognitas, ad genera relatas, cum differentiis specificis, nominibus trivialibus, synonymis selectis, locis natalibus, secundum systema exuale digestas</em>, vol. 1. Salvius, Stockholm, 1200 pp. https://doi.org/10.5962/bhl.title.59734</p>
<p>Mazo, K.R.F., 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>Merrill, E.D. (1911) The Philippine species of <em>Begonia</em>. <em>Philippine Journal of Science</em>, section C, Botany 6: 379–398.</p>
<p>Merrill, E.D. (1912) New or Noteworthy Philippine Plants, IX<em>. Philippine Journal of Science </em>7: 308–310.</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>Moonlight, P.W., Ardi, W.H., Padilla, L.A., Chung, K., Fuller, D., Girmansyah, D., … Hughes, M. (2018) Dividing and conquering the fastest-growing genus: Towards a natural sectional classification of the mega-diverse genus <em>Begonia </em>(Begoniaceae). <em>Taxon </em>67 (2): 267–323. https://doi.org/10.12705/672.3</p>
<p>Nakamura, K., Rubite, R.R., Kono, Y., Macabasco, J.V., Talaña, A.D., Alejandro, G.J.D., Ho, M-J., Yang, H-A., Chung K-F. & Peng, C.I. (2021) <em>Begonia × dinglensis,</em> a natural hybrid of Philippine <em>Begonia</em> section <em>Baryandra</em>, as evidenced by morphological, phylogenetic and cytological data. <em>Phytotaxa</em> 494: 151–164. https://doi.org/10.11646/phytotaxa.494.1.12</p>
<p>Rubite, R.R., Brillantes, R.Y., Tandang, D.N., Moran, C.B., Rule, M.G.Q. & Lin, C.W. (2021) <em>Begonia benitotanii </em>(section <em>Petermannia</em>, Begoniaceae) a new species endemic to the Philippine island of Bucas Grande. <em>Phytotaxa </em>513 (3): 257–264. https://doi.org/10.11646/phytotaxa.513.3.5</p>
<p>Warburg, O. (1904) Begoniaceae. <em>In</em>: Perkins, J.R. (Ed.) <em>Fragmenta Florae Philippinae: contributions to the flora of the Philippine Islands. </em>Leipzig, Germany, pp. 54–55.</p>