Plant Ecology and Evolution 154(2): 307-315, doi: 10.5091/plecevo.2021.1780
Orophea sichaikhanii (Annonaceae), a new species from southern Thailand, with a key to the species of Orophea in Thailand and notes on some species
expand article infoAnissara Damthongdee‡, Kithisak Aongyong§, Tanawat Chaowasku‡
‡ Herbarium, Division of Plant Science and Technology, Department of Biology, Faculty of Science, Chiang Mai University, Thailand§ Sichon, Nakhon Si Thammarat, Thailand

Corresponding author: Tanawat Chaowasku ( tanawat.chaowasku@cmu.ac.th )

© Anissara Damthongdee, Kithisak Aongyong, Tanawat Chaowasku.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: Damthongdee A, Aongyong K, Chaowasku T (2021) Orophea sichaikhanii (Annonaceae), a new species from southern Thailand, with a key to the species of Orophea in Thailand and notes on some species. Plant Ecology and Evolution 154(2): 307-315. https://doi.org/10.5091/plecevo.2021.1780
Open Access
Abstract

Background and aims – Recent botanical expeditions in Ranong Province, southern Thailand yielded unidentifiable collections of Orophea subgenus Sphaerocarpon (Annonaceae). To elucidate the taxonomic status of these collections, detailed morphological examinations and comparisons with morphologically similar species are made.

Material and methods – This study followed standard practices of herbarium taxonomy. Specimens of Orophea spp. in BKF, CMUB, L, and QBG herbaria were studied. Digitised type specimens deposited in BM, E, G, K, and L herbaria were accessed. A stereo microscope was used for morphological observations and measurements.

Key results – A new species Orophea sichaikhanii is described and illustrated. The Peninsular Malaysian O. hastata and O. kingiana are the species most similar to the new species. Orophea sichaikhanii is different from O. hastata in several traits: indumentum on ovaries and young twigs; length of pedicels, inner petals, and inner petal claw; and inner petal colour and tip. The new species differs from O. kingiana by having dissimilar colour and tip of inner petals; lower number of stamens and carpels per flower; and glabrous ovaries. Additionally, a key to the species of Orophea in Thailand and notes on certain species are provided.

Keywords
Annonaceae, Miliuseae, morphology, new species, Orophea, subgenus Sphaerocarpon, systematics, taxonomy, southern Thailand

References

  • Chalermglin P. 2001. Family Annonaceae. Bangkok, Ban and Suan. [In Thai].
  • Chaowasku T., Aongyong K., Damthongdee A., Jongsook H. & Johnson D.M. 2020. Generic status of Winitia (Annonaceae, Miliuseae) reaffirmed by molecular phylogenetic analysis, including a new species and a new combination from Thailand. European Journal of Taxonomy 659: 1–23. https://doi.org/10.5852/ejt.2020.659
  • Chaowasku T., Damthongdee A., Jongsook H., et al. 2018a. Enlarging the monotypic Monocarpieae (Annonaceae, Malmeoideae): recognition of a second genus from Vietnam informed by morphology and molecular phylogenetics. Candollea 73(2): 261–275. https://doi.org/10.15553/c2018v732a11
  • Chaowasku T., Damthongdee A., Jongsook H., et al. 2018b. Genus Huberantha (Annonaceae) revisited: erection of Polyalthiopsis, a new genus for H. floribunda, with a new combination H. luensis. Annales Botanici Fennici 55(1–3): 121–136. https://doi.org/10.5735/085.055.0114
  • Chaowasku T., Keßler P.J.A., Punnadee S. & van der Ham R.W.J.M. 2011. Taxonomic novelties and pollen morphological study in the genus Neo-uvaria (Annonaceae). Phytotaxa 32: 27–42. https://doi.org/10.11646/phytotaxa.32.1.3
  • Chaowasku T., Thomas D.C., van der Ham R.W.J.M., Smets E.F., Mols J.B. & Chatrou L.W. 2014. A plastid DNA phylogeny of tribe Miliuseae: insights into relationships and character evolution in one of the most recalcitrant major clades of Annonaceae. American Journal of Botany 101(4): 691–709. https://doi.org/10.3732/ajb.1300403
  • Chatrou L.W., Pirie M.D., Erkens R.H.J., et al. 2012. A new subfamilial and tribal classification of the pantropical flowering plant family Annonaceae informed by molecular phylogenetics. Botanical Journal of the Linnean Society 169(1): 5–40. https://doi.org/10.1111/j.1095-8339.2012.01235.x
  • Chatrou L.W., Turner I.M., Klitgaard B.B., Maas P.J.M. & Utteridge T.M.A. 2018. A linear sequence to facilitate curation of herbarium specimens of Annonaceae. Kew Bulletin 73: 39. https://doi.org/10.1007/S12225-018-9764-3
  • Craib W.G. 1922. Contributions to the flora of Siam. Additamentum XIII. Bulletin of Miscellaneous Information, Kew 1922(8): 225–241. https://doi.org/10.2307/4111699
  • Craib W.G. 1925. Contributions to the flora of Siam. Additamentum XV. Bulletin of Miscellaneous Information, Kew 1925(1): 7–23. https://doi.org/10.2307/4107434
  • Damthongdee A., Aongyong K. & Chaowasku T. 2019. Mitrephora chulabhorniana (Annonaceae), an extraordinary new species from southern Thailand. Brittonia 71(4): 381–388. https://doi.org/10.1007/s12228-019-09573-0
  • Gardner S., Sidisunthorn P. & Chayamarit K. 2015. Forest trees of southern Thailand vol. 1. Acanthaceae to Escalloniaceae. Bangkok, Kobfai Printing Project.
  • Guo X., Tang C.C., Thomas D.C., Couvreur T.L.P. & Saunders R.M.K. 2017. A mega-phylogeny of the Annonaceae: taxonomic placement of five enigmatic genera and recognition of a new tribe, Phoenicantheae. Scientific Reports 7: 7323. https://doi.org/10.1038/s41598-017-07252-2
  • Hewson H.J. 1988. Plant indumentum. A handbook of terminology [Australian Flora and Fauna Series 9]. Canberra, Australian Government Publishing Service.
  • Hooker J.D. & Thomson T. 1872. Anonaceae. In: Hooker J.D. (ed.) Flora of British India vol. 1 (part 1): 45–94. London, Reeve & Co.
  • IUCN 2012. IUCN Red List categories and criteria. Version 3.1. Second edition. Gland & Cambridge, IUCN.
  • Johnson D.M., Liu M.F., Saunders R.M.K., Chalermglin P. & Chaowasku T. 2019. A revision of Meiogyne (Annonaceae) in Thailand, with descriptions of four new species. Thai Forest Bulletin (Botany) 47(1): 91–107. https://doi.org/10.20531/tfb.2019.47.1.13
  • Johnson D.M., Chaowasku T., Murray N.A. & Chalermglin P. 2021. Three new species of Trivalvaria (Annonaceae) from Thailand, with a key to the Thai species. Phytotaxa 489(1): 79–86. https://doi.org/10.11646/phytotaxa.489.1.6
  • Keßler P.J.A. 1988. Revision der Gattung Orophea Blume (Annonaceae). Blumea 33(1): 1–80.
  • Keßler P.J.A. 1990. Studies on the tribe Saccopetaleae (Annonaceae)–II. Additions to the genus Orophea Blume. Blumea 34(2): 505–516.
  • King G. 1892. Materials for a flora of the Malay Peninsula. Journal of the Asiatic Society of Bengal (Part 2, Natural Science) 61: 1–130.
  • Leonardía A.A.P. & Keßler P.J.A. 2001. Additions to Orophea subgenus Sphaerocarpon: revision and transfer of Mezzettiopsis. Blumea 46(1): 141–163.
  • Sinclair J. 1955. A revision of the Malayan Annonaceae. Gardens’ Bulletin Singapore 14(2): 149–516.
  • Su Y.C.F., Chaowasku T. & Saunders R.M.K. 2010. An extended phylogeny of Pseuduvaria (Annonaceae) with descriptions of three new species and a reassessment of the generic status of Oreomitra. Systematic Botany 35(1): 30–39. https://doi.org/10.1600/036364410790862533
  • Yoosukkee C., Damthongdee A., Jongsook, H. & Chaowasku T. 2020. Pseuduvaria khaosokensis sp. nova (Annonaceae), a new species from southern Thailand as evidenced by plastid phylogeny and morphology. Annales Botanici Fennici 58(1–3): 49–59. https://doi.org/10.5735/085.058.0109