Abstract
A new species of Cyne (Loranthaceae) from Bucas Grande and Dinagat Islands, Philippines is described and named C. barcelonae in honor of the Filipina botanist Julie F. Barcelona. Phylogenetic analysis using the complete nuclear ribosomal DNA cistron confirms it is sister to C. banahaensis, the only species among the six in the genus with complete descriptions of floral morphology. The species is similar to the rare C. perfoliata of Papua New Guinea by having connate-perfoliate upper leaves but differs from others in the genus by possessing palmate leaf venation, inflorescences lacking an operculum, light green corollas, and stamens with filaments. No type material for Cyne quadriangula exists, thus this taxon is only known from the original protologue. It was rediscovered on Bucas Grande Island and that collection was described and used as the neotype for the species. A revised description of the genus and key to the seven species is provided.
References
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<p>Pelser, P.B., Nickrent, D.L., Reintar, A.R.T. & Barcelona, J.F. (2016) <em>Lepeostegeres cebuensis</em> (Loranthaceae), a new mistletoe species from Cebu, Philippines. <em>Phytotaxa </em>266: 48–52. http://dx.doi.org/10.11646/phytotaxa.266.1.8</p>
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<p>Barlow, B.A. (1974) A revision of the Loranthaceae of New Guinea and the south-western Pacific. <em>Australian Journal of Botany </em>22: 531–621. https://doi.org/10.1071/BT9740531</p>
<p>Barlow, B.A. (1993) Conspectus of the genera <em>Amylotheca, Cyne, Decaisnina, Lampas, Lepeostegeres</em>, and <em>Loxanthera</em> (Loranthaceae). <em>Blumea </em>38: 65–126. [https://repository.naturalis.nl/pub/525829]</p>
<p>Barlow, B.A. (1997) Loranthaceae. <em>Flora Malesiana series 1, </em>13: 209–401. [http://portal.cybertaxonomy.org/flora-malesiana/cdm_dataportal/taxon/ad82e45a-8bff-4ea0-85cf-789168c29e14]</p>
<p>Calvin, C.L. & Wilson, A.C. (2006) Comparative morphology of epicortical roots in Old and New World Loranthaceae with reference to root types, origin, patterns of longitudinal extension, and potential for clonal growth. <em>Flora </em>201: 51–64. https://doi.org/10.1016/j.flora.2005.03.001</p>
<p>Danser, B.H. (1931) The Loranthaceae of the Netherlands Indies. <em>Bulletin du Jardin Botanique de Buitenzorg </em>11: 233–519.</p>
<p>Danser, B.H. (1933a) A new system for the genera of Loranthaceae-Loranthoideae, with a nomenclator for the Old World species of this subfamily. <em>Verhandelingen der Koninklijke Akademie van Wetenschappen te Amsterdam Afdeeling Natuurkunde, Tweede sectie</em>: 1–128.</p>
<p>Danser, B.H. (1933b) <em>Thaumasianthes</em> eine neue Loranthaceengattung aus den Philippinen. <em>Recueil des Travaux Botaniques Néerlandais </em>30: 464–474.</p>
<p>Danser, B.H. (1935) A revision of the Philippine Loranthaceae. <em>Philippine Journal of Science </em>58: 1–149.</p>
<p>Danser, B.H. (1938) Miscellaneous notes on Loranthaceae, 16–18. <em>Blumea </em>3: 34–59.</p>
<p>De Alban, J.D.T., Bernabe, C.D.C. & de la Paz, B.E. (2004) Analyzing mining as a threat to forests and sustainable development. <em>In:</em> <em>Proceedings of the National Conference on Integrating Forest Conservation with Local Governance in the Philippines</em>, Subic, Zambales, Philippines. [https://www.researchgate.net/profile/Jose-Don-De-Alban/publication/270956789_Analyzing_mining_as_a_threat_to_forests_and_sustainable_development/links/54ba434d0cf29e0cb049da3b/Analyzing-mining-as-a-threat-to-forests-and-sustainable-development.pdf]</p>
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<p>Dodsworth, S. (2015) Genome skimming for next-generation biodiversity analysis. <em>Trends in Plant Science </em>20: 525–527. https://doi.org/10.1016/j.tplants.2015.06.012</p>
<p>Elmer, A.D.E. (1911) <em>Loranthus</em> in the vicinity of Mount Apo. <em>Leaflets of Philippine Botany </em>3: 1067–1076. [https://www.biodiversitylibrary.org/item/6762]</p>
<p>Engler, A. (1897) Loranthaceae. <em>In:</em> Engler, A. & Prantl, K. (Eds.) <em>Die Natürlichen Planzenfamilien</em>. Wilhelm Engelmann, Leipzig, pp. 124–140. [https://www.biodiversitylibrary.org/item/56493]</p>
<p>Fernando, E.S., Quakenbush, J.P., Lillo, E.P. & Ong, P.S. (2018) <em>Medinilla theresae</em> (Melastomataceae), a new species from ultramafic soils in the Philippines. <em>PhytoKeys </em>113: 145–155. https://doi.org/10.3897/phytokeys.113.30027</p>
<p>Fernando, E.S. & Wilson, P.G. (2021) <em>Tristaniopsis flexuosa</em> (Myrtaceae), a new species from ultramafic soils in the Philippines. <em>Telopea </em>24: 345–349. https://doi.org/10.7751/telopea15588</p>
<p>Heaney, L.R. & Rabor, D.S. (1982) Mammals of Dinagat and Siargao Islands, Philippines. <em>Occasional Papers of the Museum of Zoology, University of Michigan </em>699: 1–30. [https://deepblue.lib.umich.edu/bitstream/handle/2027.42/57135/OP699.pdf]</p>
<p>Ibañez, J.C. & Salvador, D.I.E. (2008) Eastern Mindanao Biodiversity Corridor Conservation Framework. Philippine Eagle Foundation, Conservation International-Philippines, Department of Environment and Natural Resources., Davao City, Philippines, 95 pp.</p>
<p>IUCN (2019) Guidelines for using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Subcommittee of the IUCN Species Survival Commission. Available from: http://cmsdocs.s3.amazonaws.com/RedListGuidelines.pdf (accessed 13 January 2022)</p>
<p>Kuijt, J. (1981) Inflorescence morphology of the Loranthaceae - an evolutionary synthesis. <em>Blumea </em>27: 1–73.</p>
<p>Larsson, A. (2014) AliView: a fast and lightweight alignment viewer and editor for large datasets <em>Bioinformatics </em>30: 3276–3278. https://doi.org/10.1093/bioinformatics/btu531</p>
<p>Lillo, E.P., Fernando, E.S. & Lillo, M.J. (2019) Plant diversity and structure of forest habitat types on Dinagat Island, Philippines. <em>Journal of Asia-Pacific Biodiversity </em>12: 83–105. https://doi.org/10.1016/j.japb.2018.07.003</p>
<p>Liu, B., Le, C.T., Barrette, R.L., Nickrent, D.L., Chen, Z., Lu, L. &Vidal-Russell, R. (2018) Historical biogeography of Loranthaceae (Santalales): Diversification agrees with emergence of tropical forests and radiation of songbirds. <em>Molecular Phylogenetics and Evolution </em>124: 199–212. https://doi.org/10.1016/j.ympev.2018.03.010</p>
<p>Maglangit, E.P.T., Tapdasan, R.J.C., Medija, J.R.C., De Alba, M.F.P., Adamat, L.A., Amparado, O.A., <em>et al.</em> (2021) New distribution record, ecology and tail trifurcation of <em>Cyrtodactylus mamanwa</em> (Gekkonidae) on Dinagat Islands, Philippines. <em>Herpetozoa </em>34: 175–181. https://doi.org/10.3897/herpetozoa.34.e67196.</p>
<p>Mazo, K.R., Nickrent, D.L. & Pelser, P.B. (2022) <em>Macrosolen zamboangensis</em> (Loranthaceae), a new mistletoe species from Zamboanga Peninsula, Philippines. <em>Webbia </em>77: 127–134. https://doi.org/10.36253/jopt-12339</p>
<p>Merrill, E.D. (1912) New or noteworthy Philippine plants. IX. <em>The Philippine Journal of Science </em>7: 259–357. [https://www.biodiversitylibrary.org/page/11279056#page/329/mode/1up]</p>
<p>Merrill, E. (1914) New or noteworthy Philippine plants. X. <em>Philippine Journal of Science </em>9: 261–337. [https://www.biodiversitylibrary.org/page/11279056#page/439/mode/1up]</p>
<p>Nakagawa, M. & Franco, H.E.A. (1995) PGE abundance in ophiolitic rocks and soil from Samar and Dinagat Islands, Philippines. <em>GEOSEA 95 Pro. Sp l. Issue Journal of Asian Earth Sciences</em>.</p>
<p>Nickrent, D.L. (2020) Parasitic angiosperms: How often and how many? <em>Taxon </em>69: 5–27. https://doi.org/10.1002/tax.12195</p>
<p>Nickrent, D.L., Anderson, F. & Kuijt, J. (2019) Inflorescence evolution in Santalales: Integrating morphological characters and molecular phylogenetics. <em>American Journal of Botany </em>106: 402–414. https://doi.org/10.1002/ajb2.1250</p>
<p>Nickrent, D.L., Malécot, V., Vidal-Russell, R. & Der, J.P. (2010) A revised classification of Santalales. <em>Taxon </em>59: 538–558. https://doi.org/10.1002/tax.592019</p>
<p>Nickrent, D.L., Su, H.-J., Lin, R.-Z., Devkota, M.P., Hu, J.-M. & Glatzel, G. (2021) Examining the needle in the haystack: evolutionary relationships in the mistletoe genus <em>Loranthus</em> Jacq. (Loranthaceae). <em>Systematic Botany </em>46: 403–415. https://doi.org/10.1600/036364421X16231785234748</p>
<p>Ong, P.S., Afuang, L.E. & Rosell-Ambol, R.G.E. (2002) Philippine Biodiversity Conservation Priorities: A Second Iteration of the National Biodiversity Strategy and Action Plan. <em>In</em>. Department of Environment and Natural Resources, Quezon City, Philippines.</p>
<p>Pelser, P.B. & Barcelona, J.F. (2013) Discovery through photography: <em>Amyema nickrentii</em>, a new species of Loranthaceae from Aurora Province, Philippines. <em>Phytotaxa </em>125: 47–52. http://dx.doi.org/10.11646/phytotaxa.125.1.7</p>
<p>Pelser, P.B., Barcelona, J.F. & Nickrent, D.L.e. (2011 onwards) Co’s Digital Flora of the Philippines. Available from: http://www.philippineplants.org (accessed 10 January 2022)</p>
<p>Pelser, P.B., Nickrent, D.L., Reintar, A.R.T. & Barcelona, J.F. (2016) <em>Lepeostegeres cebuensis</em> (Loranthaceae), a new mistletoe species from Cebu, Philippines. <em>Phytotaxa </em>266: 48–52. http://dx.doi.org/10.11646/phytotaxa.266.1.8</p>
<p>Su, H.-J., Hu, J.-M., Anderson, F.E. & Nickrent, D.L. (2015) Phylogenetic relationships of Santalales with insights into the origins of holoparasitic Balanophoraceae. <em>Taxon </em>64: 491–506. https://doi.org/10.12705/643.2</p>
<p>Tahil, A.A. (2021) <em>Decaisnina samaense</em> (Loranthaceae): A new mistletoe species from Simunul Island, Philippines. <em>Harvard Papers in Botany </em>26: 471–475. https://doi.org/10.3100/hpib.v26iss2.2021.n13</p>
<p>Tandang, D.N., Galindon, J.M.M., Lagunday, N.E., Coritico, F.P., Amoroso, V.B. & Robinson, A.S. (2021) <em>Amylotheca cleofei</em> sp. nov. (Loranthaceae), a new species and genus record for the Philippines. <em>Phytotaxa </em>507 (1): 113–120. https://doi.org/10.11646/phytotaxa.507.1.7</p>
<p>Tandang, D.N., delos Angeles, M., Buot, I.J.E., Devkota, M.P. & Caraballo-Ortiz, M.A. (2022) <em>Decaisnina tomentosa</em> (Loranthaceae), a new species of mistletoe from Samar Island, Philippines. <em>Biodiversity Data Journal </em>10: e78457. https://doi.org/10.3897/BDJ.10.e78457</p>
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