Abstract
Camellia suddeeana, a new species endemic to northern Thailand that was previously misidentified as C. tenii, is described and illustrated here. It is similar to C. szemaoensis and C. hainingii for sharing the subsessile flower with white petals and distinct styles, but can be distinguished from the former by its glabrous abaxial surface of the sepals, ovary and seeds, leaves without cork-warts and a different flowering period, and from the latter by leaves without cork-warts and the longer styles. Based on its morphology, C. suddeeana may be placed in C. sect. Heterogena or C. sect. Furfuracea according to the classifications proposed by Ming and Chang, respectively.
References
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;"><span lang="en-GB"><em>Chang, H.T. (1981) </em></span><em>A taxonomy of the genus </em>Camellia. The Editorial Staff of the Journal of Sun Yatsen University, Guangzhou, 180 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Chang, H.T. (1998) Theaceae (1) Theoideae 1. <em>Camellia</em>. <em>In</em>: Delectis Florae Reipublicae Popularis Sinicae Agendae Academiae Sinicae Edita (Ed.) <em>Flora Reipublicae Popularis Sinicae</em>, Tomus 49 (3). Science Press, Beijing, pp. 3–195.</span></span></span></p>
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ming, T.L. (2000) <em>Monograph of the genus </em>Camellia. Yunnan Science and Technology Press, Kunming, 352 pp.</span></span></span></p>
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Orel, G. & Curry, A.S. (2015) <em>In pursuit of hidden camellias: 32 new </em>Camellia<em> species from Vietnam and China</em>. Theaceae Exploration Associates, Sydney, 339 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Orel, G. & Curry, A.S. (2019) Camellia<em>–work in progress</em>. Theaceae Exploration Associates, Sydney, 457 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sealy, J.R. (1949) New names in <em>Camellia</em>. <em>Kew Bulletin</em> 4: 215–222. [https://www.jstor.org/stable/4113679]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sealy, J.R. (1958) <em>A revision of the genus </em>Camellia. The Royal Horticultural Society, London, 239 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Souladeth, P., Tagane, S. & Yahara, T. (2019) Flora of Nam Kading National Protected Area V: Two new species of <em>Camellia</em> (Theaceae), <em>C. namkadingensis</em> and <em>C. rosacea</em>. <em>Thai Forest Bulletin (Botany)</em> 47: 82–90. https://doi.org/10.20531/tfb.2019.47.1.12</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B.M. (2023 [continuously updated]) Index Herbariorum. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 18 April 2023).</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.H., Li, D.Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) <em>International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017</em>. Regnum Vegetabile 159. Koeltz Botanical Books, Glashütten, 254 pp. https://doi.org/10.12705/Code.2018</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ye, P.M., Huang, Y.S., Huang, J.F., Liu, E.D., Ma, J.L. & Yang, S.X. (2022) <em>Camellia hainingii</em>, a new species of Theaceae in China. <em>Phytotaxa</em> 558: 291–296. https://doi.org/10.11646/phytotaxa.558.3.5</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Zhao, D.W. (2022) Nomenclature, typification, and natural distribution of <em>Camellia sinensis</em> var. <em>assamica</em> (Theaceae). <em>Journal of Tea Science</em> 42: 491–499. [http://www.tea-science.com/CN/Y2022/V42/I4/491]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Zhao, D.W., Hodkinson, T.R. & Parnell, J.A.N. (2023) Phylogenetics of global <em>Camellia</em> (Theaceae) based on three nuclear regions and its implications for systematics and evolutionary history. <em>Journal of Systematics and Evolution</em> 61: 356–368. https://doi.org/10.1111/jse.12837</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Chang, H.T. (1998) Theaceae (1) Theoideae 1. <em>Camellia</em>. <em>In</em>: Delectis Florae Reipublicae Popularis Sinicae Agendae Academiae Sinicae Edita (Ed.) <em>Flora Reipublicae Popularis Sinicae</em>, Tomus 49 (3). Science Press, Beijing, pp. 3–195.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Keng, H. (1972) Theaceae. <em>In</em>: Smitinand, T. & Larsen, K. (Eds.) <em>Flora of Thailand</em>, Vol 2 (2). Tistr Press, Bangkok, pp. 142–158.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) <em>Species plantarum</em>. L. Salvius, Stockholm, 1200 pp. https://doi.org/10.5962/bhl.title.669</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ly, N.S., Luong, V.D., Le, T.H., Do, N.D., Tran, N., Nguyen, A.D., Nguyen, T.L., Uematsu, C. & Katayama, H. (2022) <em>Camellia annamensis</em> (Theaceae), a new species from central Vietnam. <em>Taiwania</em> 67: 243–249. https://doi.org/10.6165/tai.2022.67.243</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ming, T.L. (2000) <em>Monograph of the genus </em>Camellia. Yunnan Science and Technology Press, Kunming, 352 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ming, T.L. & Bartholomew, B. (2007) Theaceae. <em>In</em>: Wu, C.Y., Raven, P.H. & Hong, D.Y. (Eds.) <em>Flora of China</em> 12. Science Press, Beijing & Missouri Botanical Garden Press, St. Louis, pp. 366–478.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Orel, G. & Curry, A.S. (2015) <em>In pursuit of hidden camellias: 32 new </em>Camellia<em> species from Vietnam and China</em>. Theaceae Exploration Associates, Sydney, 339 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Orel, G. & Curry, A.S. (2019) Camellia<em>–work in progress</em>. Theaceae Exploration Associates, Sydney, 457 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sealy, J.R. (1949) New names in <em>Camellia</em>. <em>Kew Bulletin</em> 4: 215–222. [https://www.jstor.org/stable/4113679]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sealy, J.R. (1958) <em>A revision of the genus </em>Camellia. The Royal Horticultural Society, London, 239 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Souladeth, P., Tagane, S. & Yahara, T. (2019) Flora of Nam Kading National Protected Area V: Two new species of <em>Camellia</em> (Theaceae), <em>C. namkadingensis</em> and <em>C. rosacea</em>. <em>Thai Forest Bulletin (Botany)</em> 47: 82–90. https://doi.org/10.20531/tfb.2019.47.1.12</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B.M. (2023 [continuously updated]) Index Herbariorum. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 18 April 2023).</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.H., Li, D.Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) <em>International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017</em>. Regnum Vegetabile 159. Koeltz Botanical Books, Glashütten, 254 pp. https://doi.org/10.12705/Code.2018</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Ye, P.M., Huang, Y.S., Huang, J.F., Liu, E.D., Ma, J.L. & Yang, S.X. (2022) <em>Camellia hainingii</em>, a new species of Theaceae in China. <em>Phytotaxa</em> 558: 291–296. https://doi.org/10.11646/phytotaxa.558.3.5</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Zhao, D.W. (2022) Nomenclature, typification, and natural distribution of <em>Camellia sinensis</em> var. <em>assamica</em> (Theaceae). <em>Journal of Tea Science</em> 42: 491–499. [http://www.tea-science.com/CN/Y2022/V42/I4/491]</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Zhao, D.W., Hodkinson, T.R. & Parnell, J.A.N. (2023) Phylogenetics of global <em>Camellia</em> (Theaceae) based on three nuclear regions and its implications for systematics and evolutionary history. <em>Journal of Systematics and Evolution</em> 61: 356–368. https://doi.org/10.1111/jse.12837</span></span></span></p>