Abstract
A new species of the genus Lithocarpus, L. eiadthongii, from southern part of Thailand is described and illustrated. Its colour photographs are also provided and its conservation status is assessed. The new species is superficially similar to L. melataiensis, L. pusillus and L. vuquangensis in terms of leaf and fruit size. Notwithstanding, it differs from the three species in several aspects e.g. leaf apex, leaf blade covering, cupule stalk, cupule size, nut size and nut enclosure.
References
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<p>IUCN Standards and Petitions Committee (2019) <em>Guidelines for Using the IUCN Red List Categories and Criteria.</em> Version 14. Prepared by the Standards and Petitions Committee. [http://www.iucnredlist.org/documents/RedListGuidelines.pdf]</p>
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<p>Strijk, J.S., Rueangruea, S., Sirimongkol, S. & Suddee, S. (2014a) <em>Lithocarpus corneus </em>(Fagaceae), a new record for the Flora of Thailand. <em>Thai Forest Bulletin (Botany)</em> 42: 1–5.</p>
<p>Strijk, J.S., Sirimongkol, S., Rueangruea, S., Ritphet, N. & Chamchumroon, V. (2014b) <em>Lithocarpus orbicarpus</em> (Fagaceae), a new species of stone oak from Phang Nga province, Thailand. <em>PhytoKeys </em>34: 33–46. https://doi.org/10.3897/phytokeys.34.6429</p>
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<p>The Plant List (2013) Version 1.1. Published on the Internet: http://www.theplantlist.org/ (accessed 4 June 2021)</p>
<p>Thiers, B. (2020 [continuously updated]) <em>Index Herbariorum: a global directory of public herbaria and associated staff. </em>New York Botanical Garden’s Virtual Herbarium.</p>
<p>Blume, C.L. (1826) <em>Bijdragen tot de Flora van Nederlandsch Indie</em>, part 10. Batavia : Ter Lands Drukkerij. [https://www.biodiversitylibrary.org/item/9224#page/1/mode/1up]</p>
<p>Camus, A. (1931) Sur quelques genres de Fagacees. <em>Rivièra Scientifique</em> 18e ann: 37–42.</p>
<p>Dumortier, B.C.J. (1829) <em>Analyse des Familles de Plantes: avec l’indication des principaux genres qui s’y rattachent.</em> Tournay : Impr. de J. Casterman, Aineì. [https://www.biodiversitylibrary.org/item/32871#page/8/mode/1up] https://doi.org/10.5962/bhl.title.443</p>
<p>Eiadthong, W. (1993) <em>The taxonomic study of the family Fagaceae in Haui Kha Kheng Wildlife Sanctuary. </em>MSc. Thesis, Kasetsart University.</p>
<p>IUCN Standards and Petitions Committee (2019) <em>Guidelines for Using the IUCN Red List Categories and Criteria.</em> Version 14. Prepared by the Standards and Petitions Committee. [http://www.iucnredlist.org/documents/RedListGuidelines.pdf]</p>
<p>Julia, S. & Soepadmo, E. (1998) New species and new record of <em>Lithocarpus</em> Blume (Fagaceae) from Sabah and Sarawak, Malaysia. <em>Gardens’ Bulletin Singapore</em> 50: 125−150.</p>
<p>Linnaeus, C. (1753) <em>Species Plantarum.</em> Laurentius Salvius, Stockholm. [https://www.biodiversitylibrary.org/page/358580#page/436/mode/1up] https://doi.org/10.3897/phytokeys.95.21832</p>
<p>Ngoc, N.V., Hung, N.V., Binh, H.T., Tagane, S., Toyama, H., Hoang, T.S., Ha, T.V. & Yahara, T. (2018) <em>Lithocarpus vuquangensis</em> (Fagaceae), a new species fromVu Quang National Park, Vietnam. <em>PhytoKeys</em> 95: 15−25.</p>
<p>Phengklai, C. (2008) Fagaceae. <em>In</em>: Santisuk, T. & Larsen, K. (Eds.) <em>Flora of Thailand.</em> Vol. 9 (3). The Forest Herbarium, Bangkok, pp. 179−410.</p>
<p>Rehder, A. (1917) <em>Lithocarpus</em>. <em>In</em>: Bailey, L.H. (Ed.)<em> The standard cyclopedia of horticulture; a discussion, for the amateur, and the professional and commercial grower, of the kinds, characteristics and methods of cultivation of the species of plants grown in the regions of the United States and Canada for ornament, for fancy, for fruit and for vegetables; with keys to the natural families and genera, descriptions of the horticultural capabilities of the states and provinces and dependent islands, and sketches of eminent horticulturists.</em> 3<sup>rd</sup> edition. New York, Macmillan, 1919. pp. 3569. [https://www.biodiversitylibrary.org/item/64403#page/581/mode/1up]</p>
<p>Soepadmo, E. (1970) Florae Malesianae Praecursores XLIX: Malesian species of <em>Lithocarpus</em> Bl. (Fagaceae). <em>Reinwardtia</em> 8 (1): 197−308. [https://e-journal.biologi.lipi.go.id/index.php/reinwardtia/article/viewFile/953/807]</p>
<p>Soepadmo, E. (1972) Fagaceae. <em>In: Flora Malesiana</em> Series I, Vol. 7 (2). Rijksherbarium /Hortus Botanicus, Leiden University, Leiden, The Netherlands.</p>
<p>Strijk, J.S., Rueangruea, S., Sirimongkol, S. & Suddee, S. (2014a) <em>Lithocarpus corneus </em>(Fagaceae), a new record for the Flora of Thailand. <em>Thai Forest Bulletin (Botany)</em> 42: 1–5.</p>
<p>Strijk, J.S., Sirimongkol, S., Rueangruea, S., Ritphet, N. & Chamchumroon, V. (2014b) <em>Lithocarpus orbicarpus</em> (Fagaceae), a new species of stone oak from Phang Nga province, Thailand. <em>PhytoKeys </em>34: 33–46. https://doi.org/10.3897/phytokeys.34.6429</p>
<p>Strijk, J.S. & Son, H.T. (2019) <em>Lithocarpus gigantophyllus</em> (Fagaceae), a new record from Loei province (Thailand). <em>Thai Forest Bulletin (Botany)</em> 47 (2): 145–151. https://doi.org/10.20531/tfb.2019.47.2.04</p>
<p>The Plant List (2013) Version 1.1. Published on the Internet: http://www.theplantlist.org/ (accessed 4 June 2021)</p>
<p>Thiers, B. (2020 [continuously updated]) <em>Index Herbariorum: a global directory of public herbaria and associated staff. </em>New York Botanical Garden’s Virtual Herbarium.</p>