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
Barnett, E.C. (1940) The Fagaceae of Thailand and their geographical distribution. Transactions of the Botanical Society of Edinburgh 33 (3): 327–343. [https://www.tandfonline.com/doi/abs/10.1080/13594864209441386] https://doi.org/10.1080/13594864209441386
Blume, C.L. (1826) Bijdragen tot de Flora van Nederlandsch Indie, part 10. Batavia : Ter Lands Drukkerij. [https://www.biodiversitylibrary.org/item/9224#page/1/mode/1up]
Camus, A. (1931) Sur quelques genres de Fagacees. Rivièra Scientifique 18e ann: 37–42.
Dumortier, B.C.J. (1829) Analyse des Familles de Plantes: avec l’indication des principaux genres qui s’y rattachent. Tournay : Impr. de J. Casterman, Aineì. [https://www.biodiversitylibrary.org/item/32871#page/8/mode/1up] https://doi.org/10.5962/bhl.title.443
Eiadthong, W. (1993) The taxonomic study of the family Fagaceae in Haui Kha Kheng Wildlife Sanctuary. MSc. Thesis, Kasetsart University.
IUCN Standards and Petitions Committee (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. [http://www.iucnredlist.org/documents/RedListGuidelines.pdf]
Julia, S. & Soepadmo, E. (1998) New species and new record of Lithocarpus Blume (Fagaceae) from Sabah and Sarawak, Malaysia. Gardens’ Bulletin Singapore 50: 125?150.
Linnaeus, C. (1753) Species Plantarum. Laurentius Salvius, Stockholm. [https://www.biodiversitylibrary.org/page/358580#page/436/mode/1up] https://doi.org/10.3897/phytokeys.95.21832
Ngoc, N.V., Hung, N.V., Binh, H.T., Tagane, S., Toyama, H., Hoang, T.S., Ha, T.V. & Yahara, T. (2018) Lithocarpus vuquangensis (Fagaceae), a new species fromVu Quang National Park, Vietnam. PhytoKeys 95: 15?25.
Phengklai, C. (2008) Fagaceae. In: Santisuk, T. & Larsen, K. (Eds.) Flora of Thailand. Vol. 9 (3). The Forest Herbarium, Bangkok, pp. 179?410.
Rehder, A. (1917) Lithocarpus. In: Bailey, L.H. (Ed.) 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. 3<sup>rd</sup> edition. New York, Macmillan, 1919. pp. 3569. [https://www.biodiversitylibrary.org/item/64403#page/581/mode/1up]
Soepadmo, E. (1970) Florae Malesianae Praecursores XLIX: Malesian species of Lithocarpus Bl. (Fagaceae). Reinwardtia 8 (1): 197?308. [https://e-journal.biologi.lipi.go.id/index.php/reinwardtia/article/viewFile/953/807]
Soepadmo, E. (1972) Fagaceae. In: Flora Malesiana Series I, Vol. 7 (2). Rijksherbarium /Hortus Botanicus, Leiden University, Leiden, The Netherlands.
Strijk, J.S., Rueangruea, S., Sirimongkol, S. & Suddee, S. (2014a) Lithocarpus corneus (Fagaceae), a new record for the Flora of Thailand. Thai Forest Bulletin (Botany) 42: 1–5.
Strijk, J.S., Sirimongkol, S., Rueangruea, S., Ritphet, N. & Chamchumroon, V. (2014b) Lithocarpus orbicarpus (Fagaceae), a new species of stone oak from Phang Nga province, Thailand. PhytoKeys 34: 33–46. https://doi.org/10.3897/phytokeys.34.6429
Strijk, J.S. & Son, H.T. (2019) Lithocarpus gigantophyllus (Fagaceae), a new record from Loei province (Thailand). Thai Forest Bulletin (Botany) 47 (2): 145–151. https://doi.org/10.20531/tfb.2019.47.2.04
The Plant List (2013) Version 1.1. Published on the Internet: http://www.theplantlist.org/ (accessed 4 June 2021)
Thiers, B. (2020 [continuously updated]) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium.
Blume, C.L. (1826) Bijdragen tot de Flora van Nederlandsch Indie, part 10. Batavia : Ter Lands Drukkerij. [https://www.biodiversitylibrary.org/item/9224#page/1/mode/1up]
Camus, A. (1931) Sur quelques genres de Fagacees. Rivièra Scientifique 18e ann: 37–42.
Dumortier, B.C.J. (1829) Analyse des Familles de Plantes: avec l’indication des principaux genres qui s’y rattachent. Tournay : Impr. de J. Casterman, Aineì. [https://www.biodiversitylibrary.org/item/32871#page/8/mode/1up] https://doi.org/10.5962/bhl.title.443
Eiadthong, W. (1993) The taxonomic study of the family Fagaceae in Haui Kha Kheng Wildlife Sanctuary. MSc. Thesis, Kasetsart University.
IUCN Standards and Petitions Committee (2019) Guidelines for Using the IUCN Red List Categories and Criteria. Version 14. Prepared by the Standards and Petitions Committee. [http://www.iucnredlist.org/documents/RedListGuidelines.pdf]
Julia, S. & Soepadmo, E. (1998) New species and new record of Lithocarpus Blume (Fagaceae) from Sabah and Sarawak, Malaysia. Gardens’ Bulletin Singapore 50: 125?150.
Linnaeus, C. (1753) Species Plantarum. Laurentius Salvius, Stockholm. [https://www.biodiversitylibrary.org/page/358580#page/436/mode/1up] https://doi.org/10.3897/phytokeys.95.21832
Ngoc, N.V., Hung, N.V., Binh, H.T., Tagane, S., Toyama, H., Hoang, T.S., Ha, T.V. & Yahara, T. (2018) Lithocarpus vuquangensis (Fagaceae), a new species fromVu Quang National Park, Vietnam. PhytoKeys 95: 15?25.
Phengklai, C. (2008) Fagaceae. In: Santisuk, T. & Larsen, K. (Eds.) Flora of Thailand. Vol. 9 (3). The Forest Herbarium, Bangkok, pp. 179?410.
Rehder, A. (1917) Lithocarpus. In: Bailey, L.H. (Ed.) 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. 3<sup>rd</sup> edition. New York, Macmillan, 1919. pp. 3569. [https://www.biodiversitylibrary.org/item/64403#page/581/mode/1up]
Soepadmo, E. (1970) Florae Malesianae Praecursores XLIX: Malesian species of Lithocarpus Bl. (Fagaceae). Reinwardtia 8 (1): 197?308. [https://e-journal.biologi.lipi.go.id/index.php/reinwardtia/article/viewFile/953/807]
Soepadmo, E. (1972) Fagaceae. In: Flora Malesiana Series I, Vol. 7 (2). Rijksherbarium /Hortus Botanicus, Leiden University, Leiden, The Netherlands.
Strijk, J.S., Rueangruea, S., Sirimongkol, S. & Suddee, S. (2014a) Lithocarpus corneus (Fagaceae), a new record for the Flora of Thailand. Thai Forest Bulletin (Botany) 42: 1–5.
Strijk, J.S., Sirimongkol, S., Rueangruea, S., Ritphet, N. & Chamchumroon, V. (2014b) Lithocarpus orbicarpus (Fagaceae), a new species of stone oak from Phang Nga province, Thailand. PhytoKeys 34: 33–46. https://doi.org/10.3897/phytokeys.34.6429
Strijk, J.S. & Son, H.T. (2019) Lithocarpus gigantophyllus (Fagaceae), a new record from Loei province (Thailand). Thai Forest Bulletin (Botany) 47 (2): 145–151. https://doi.org/10.20531/tfb.2019.47.2.04
The Plant List (2013) Version 1.1. Published on the Internet: http://www.theplantlist.org/ (accessed 4 June 2021)
Thiers, B. (2020 [continuously updated]) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium.