秋海棠屬為一個包含超過1,500個物種的大屬，分布於亞洲、非洲與美洲之熱帶與亞熱帶地區。側膜組（Begonia sect. Coelocentrum）為1939年由Irmscher所創立的，是一個亞洲分布組，分布於中國南方與越南北方，為典型的石灰岩植物類群，大部分為稀有或侷限分布種。側膜組之秋海棠大多數種類葉片都具有美麗的花紋或獨特質地，十分具有觀賞價值。本研究進行了形態學、細胞學、孢粉學等方面的研究，並利用數值分析法對中國產秋海棠屬側膜組植物進行系統分類研究，使用了85個OTU，以及形態與生態的特徵共204個，在方法上以PCA的性狀相關性分析對於各特徵予以合理的加權。經由分析的結果認為假厚葉秋海棠（B. pseudodryadis）與其他側膜組成員差異頗大，應將之獨自分出一個新的亞組（subsect. Pseudodryades）。參考數值分析的結果，將中國產秋海棠屬側膜組植物分為51個分類群，包含47個種與4個變種。本研究依據形態的觀察與數值分析的結果將靖西秋海棠（B. jingxiensis）、馬山秋海棠（B. mashanica）與都安秋海棠（B. suboblata）由秋海棠組轉移至側膜組，並將馬山秋海棠降為靖西秋海棠的變種。簇毛傘葉秋海棠（B. umbraculifolia var. flocculosa）原為傘葉秋海棠的變種，經由數值分析的結果顯示該分類群的各項特徵明顯已達分種的標準而將之提升為種。分析的結果並發現有7個新種與1個新變種尚未被發表，並於本研究將之分別命名為巴馬秋海棠（B. bamaensis）、崇左秋海棠（B. chongzuoensis）、德天秋海棠（B. detianensis）、袍里秋海棠（B. fengshanensis）、湖潤秋海棠（B. hurunensis）、高氏秋海棠（B. koi）、臨桂秋海棠（B. linguiensis）與萬煜秋海棠（B. picturata var. wanyuana）。在細胞學方面，僅發現廣西秋海棠（B. guangxiensis）染色體數目為2n = 32，其餘皆為2n = 30。在空間分布上發現，側膜組之海拔分布格局隨著海拔高度增加而分類群的分布數目呈指數下降，顯示大部分側膜組秋海棠都分布在低海拔。原本秋海棠屬側膜組為一個物種數目較少的分類群，近年之研究發表了許多的新種，使得側膜組已躍升為秋海棠屬的一個大組，筆者於論文研究期間共參與發表6篇研究報告，其中包含十一個新種與一個新變種，推測全世界側膜組中應尚有許多新的物種等待人們去研究、發掘。

Begonia is a large genus comprising over 1,500 species throughout tropical and subtropical Asia, Africa and America. Begonia sect. Coelocentrum was established by Edgar Irmscher in 1939, based mainly on the parietal placentation and geographical distribution. Plants of Begonia sect. Coelocentrum are confined to the Karst areas in southern China and northern Vietnam. Most of them are rare and/or highly localized. They occur exclusively on semishady to shady limestones hills or in caves at elevations of ca. 100-1,400 m. Many are highly ornamental, displaying an amazing variety of shapes, colors, patterns and textures in their leaves. This study provides a systematic account of Begonia sect. Coelocentrum that are naturally distributed in China. Using 85 OTUs and 204 characters from morphology, chromosome numbers and distributional ranges, a numerical analysis was conducted. PCA weighting method was applied. As a result, 51 taxa including 47 species and 4 additional varieties were recognized for Begonia sect. Coelocentrum in China. All but B. masoniana are endemic to China. Begonia pseudodryadis is distinct enough to be considered the only member of the new subsection Pseudodryades here erected. Begonia jingxiensis, B. mashanica, and B. suboblata, formerly misplaced in sect. Diploclinium, were transferred to sect. Coelocentrum. Begonia mashanica was sunken as a variety of B. jingxiensis. Begonia umbraculifolia var. flocculosa was elevated to the species rank. In addition, seven new species and an additional new variety were here described, namely, B. bamaensis, B. chongzuoensis, B. detianensis, B. fengshanensis, B. hurunensis, B. koi, B. linguiensis and B. picturata var. wanyuana. Through intensive taxonomic studies and field inventories, the species number of Begonia sect. Coelocentrum more than doubled from four years ago when this study started.

李宏哲。2006。中國秋海棠屬單裂組的保護生物學研究。中國科學院研究生院博士學位論文。
陳守良、徐克學、盛國英。1983。中國散生竹類的數量分類和確定分類等級的探討。植物分類學報21(2): 113–120。
Alpatov, W. W. and A. M. Boschko-Stepanenko. 1928. Variation and correlation in serially situated organs in insects, fishes and birds. Amer. Natur. 62: 409–424.
Anderson, E. and E. C. Abbe. 1934. A quantitative comparison of specific and generic differences in the Betulaceae. J. Arnold. Arboretum. 15: 43–49.
APG (Angiosperm Phylogeny Group). 1998. An ordinal classification for the families of flowering plants. Ann. Missouri Bot. Gard. 85: 531–553.
APG II. 2003. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II. Bot. J. Linn. Soc. 141(4): 399–436.
Barkley, F. A. and A. I. Baranov. 1972. The Sections of the Begoniaceae. Buxtonian 1 (suppl. 1): 1–8.
Bailey, L. H. and E. Z. Bailey. 1976. Hortus Third：Aconcise dictionary of plants cultivated in the United States and Canada. Macmillan Publishing Co. Inc., New York, USA. pp. 142–154.
Ben-Cheikh, W., J. Perez-Botella, F. R. Tadeo, M. Talon, and E. Prmo-Mill. 1997. Pollination increases gibberellin levels in developing overies of seeded varieties of Citrus. Plant Physiol. 114: 557–564.
Berg, R. G. V. D. 1983. Pollen characteristics of the genera of the Begoniaceae. Meded. Landbouwhogeschool Wageningen 83(9): 55–56
Berg, R. G. V. D. 1984. Pollen morphology of the genus Begonia in Africa. Agric. Univ. Wageningen Pap. 84(3): 5–94.
Bouman, F. & A. J. Lange. 1982. Micromorphology of the seed coats in Begonia section Squamibegonia Warb. Acta Bot. Neerl. 31(4): 297-305.
Bouman, F. & A. J. Lange. 1983. Structure, micromorphology of Begonia seed. Begonian 50: 70–78 & 91.
Breiman, L., J. H. Friedman, R. A. Olshen, and C. J. Stone. 1998. Classification and Regression Trees. Chapman and Hall, Boca Raton.
Brickell, C. (Editor-in-Chief). 1996. RHS (Royal Horticultural Society) A-Z Encyclopedia of Garden Plants. Dorling Kindersley Publishers Ltd., UK. p.166.
Chambers, J. M., W. S. Cleveland, B. Kleiner, and P. A. Tukey. 1983. Graphical Methods for Data Analysis. Duxbury Press, Boston.
Clarke, K. R. and R. M. Warwick. 2001. Change in Marine Communities: An Approach to Statistical Analysis and Interpretation. 2nd edition: PRIMER-E, Plymouth, UK.
Clarke, K. R. & R. N. Gorley. 2006. PRIMER v.6: User manual/tutorial, PRIMER-E, Plymouth, UK.
Cronquist, A. 1981. An Integrated System of Classification of Flowering Plants. Columbia University Press, New York, USA.
De Candolle, A. 1859. Mémoire sur la famille des Bégoniacées. Ann. Sci. Nat. Bot. Ser. 4. 11: 93–149.
De Candolle, A. 1864. Ordo CLXXII. Begoniaceae. Reg. Veg. Syst. Nat. 15(1): 266–408.
De Wilde, J. J. F. E. and V. Plana. 2003. A new section of Begonia (Begoniaceae) from west central Africa. Edinburgh J. Bot. 60(2): 122.
Dobzhansky, T. 1970. Genetics of the Evolutionary Process. Columbia University Press, New York, USA.
Doorenbos, J., M. S. M. Sosef and J. J. F. E. de Wilde. 1998. The sections of Begonia. Wageningen Agricultural University, Netherlands.
Dunn, G. and B. S. Everitt. 1982. An Introduction to Mathematical Taxonomy. Cambridge University Press, Cambridge, UK, and published by Dover Publications, Inc., Mineola, New York, USA.
Fang, D., Y. G. Wei, and D. H. Qin. 2004. Four new species of Begonia L. (Begoniaceae) from Guangxi, China. Acta Phytotax. Sin. 42(2):170–179.
Fang, D., S. M. Ku, Y. G. Wei, D. H. Qin, and C.-I Peng. 2006.Three new taxa of Begonia (sect. Coelocentrum, Begoniaceae) from limestone areas in Guangxi, China. Bot. Stud. 47(1): 97–110.
Forbes, W. T. M. 1933. A grouping of the Agrotine genera. Entomol. Amer. N. S. 14: 1–40.
Forrest, L. L. and P. M. Hollingsworth. 2003. A recicumscription of Begonia on nuclear ribosomal sequences. Plant Syst. Evol. 241: 193–211.
Forrest, L. L., M. Hughes, and P. M. Hollingsworth. 2005. A Phylogeny of Begonia Using Nuclear Ribosomal Sequence Data and Morphological Characters. Syst. Bot. 30(3): 671–682.
Gagnepain, F. 1921. Bégoniacées. In: M. H. Lecomte (ed.), Flore générale de l’Indochine 2(5): 1095–1120.
Goldberg, A. 1989. Classification, evolution, and phylogeny of the families of Monocotyledons. Smithsonian Contr. Bot. 71: 1–74.
Golding, J. and D. C. Wasshausen. 2002. Begoniaceae, 2nd ed. Part I: Annotated Species List; Part II: Illustrated Key, Abridgement and Supplement. Contr. U.S. Natl. Herb. 43: 1-289.
Golding, J. 2003. Begonia sections. Begonian 70: 47–50.
Gower J C. 1966. Some distance properties of latent and vector methods used in multivariate analysis. Biometrika 53: 325–338.
Gower J C. 1967. A comparison of some methods of cluster analysis. Biometrics 23: 623–637.
Graur, D. and W. H. Li. 2000. Fundamentals of Molecular Evolution. Sinauer Associates, Sunderland, Inc., Mass., USA.
Greuter, W., J. McNeill, F. R. Barrie, H. M. Burdet, V. Demoulin, T. S. Filgueiras, D. H. Nicolson, P. C. Silva, J. E. Skog, P. Trehane, N. J. Turland, D. L. Hawksworth (eds). 2000. International Code of Botanical Nomenclature (St. Louis Code). Koeltz Scientific Books, Konigstein, Germany.
Henning, W. 1966. Phylogenetic Systematics. University of Illinois Press, Urbana, USA.
Hotelling H. 1933. Analysis of a complex of statistical variables into principal components. J. Ed. Psych. 24: 417–444.
Irmscher, E. 1925. Begoniaceae. In: H. G. A. Engler and K. A. E. Prantl (eds.), Nat. Pflanzenfam. 2nd ed. 21: 575–586.
Irmscher, E. 1939. Die Begoniaceen Chinas und ihre Bedeutung fur die Frage der Formbildung in polymorphen Sippen. Mitt. Inst. Allg. Bot. Hamburg 10: 431–557.
Irmscher, E. 1951. Some new Chinese species of Begonia. Notes Roy. Bot. Gard. Edinburgh 21: 35–45.
Irmscher, E. 1959. Begonia masoniana Irmsch. Begonian 26: 202–203.
Irwin, D. E., S. Bensch and T. D. Price. 2001. Speciation in a ring. Nature 409: 333–337.
Irwin, D. E., S. Bensch, J. H. Irwin, and T. D. Price. 2005. Speciation by distance in a ring species. Science 307: 414 –416.
Jackson, J. E. 1991. A user's guide to principal components analysis. Wiley-Interscience, New York, USA.
Jardine, N. and R. Sibson. 1971. Mathematical taxonomy. Wiley-Interscience, London, UK & New York, USA.
Jin, X. B. and F. H. Wang. 1994. Style and ovary anatomy of Chinese Begonia and its taxonomic and evolutionary implications. Cathaya 6: 125–144.
Kimura, M. 1983. The neutral theory of molecular evolution. Cambridge University, Cambridge, UK.
Kiew, R. 2005. Begonias of Peninsular Malaysia. Natural History Publications (Borneo) in association with Singapore Botanic gardens and national Parks Board, Singapore.
Krishna, G. G. & V. Puri. 1962. Morphology of the flower of some Gentianaceae with special reference to placentation. Bot. Gaz. 124: 42–57.
Kruskal, J. B. 1964a. Multidimensional scaling by optimizing goodness of fit to a non-metric hypothesis. Psychometrika 29: 1–27.
Kruskal, J. B. 1964b. Non-metric multidimensional scaling: a numerical method. Psychometrika 29: 115–129.
Ku, T. C. 1999a. New taxa Begonia from China. Acta Phytotax. Sin. 37(3): 285–287.
Ku, T. C. 1999b. Begoniaceae. In T.C. Ku (ed.), Flora Reipublicae Popularis Sinicae, vol. 52 (1). Science Press, Beijing. pp. 126-269, Addenda, pp. 401–402.
Ku, S. M., C.-I Peng, and Y. Liu. 2004. Notes on Begonia (sect. Coelocentrum, Begoniaceae) from Guangxi, China, with the report of two new species. Bot. Bull. Acad. Sin. 45: 353–367.
Ku, S .M., Yan Liu, and C.-I Peng. 2006. Four new species of Begonia sect. Coelocentrum (Begoniaceae) from limestone areas in Guangxi, China. Bot. Stud. 47: 207–222.
Kurata, N. and T. Omura. 1978. Karyotype analysis in rice, I. A new method for identifying all chromosome pairs. Jpn. J. Genet. 53: 251–255.
Lawrence, G. H. M. 1951. Taxonomy of vascular plants. The Macmillan Co., New York, USA.
Legro, A. H. & J. Doorenbos. 1970. Chromosome numbers in Begonia. Begonian 37: 203–234.
Legro, A. H. & J. Doorenbos. 1971. Chromosome numbers in Begonia 2. Netherlands J. Agric. Sci. 19: 167–170.
Léveillé, H. 1910. Decades plantarum novarum. XLVI. In: Fedde, Repertorium specierum novarum regni vegetabilis. p. 20.
Léveillé, H. 1914. Flora du Kouy Tche'ou. pp. 45, 46.
Liu, Y., S. M. Ku, and C.-I Peng. 2005. Begonia picturata (sect. Coelocentrum, Begoniaceae), a new species from limestone areas in Guangxi, China. Bot. Bull. Acad. Sin. 46: 367–376.
Mallet, J. 1995. A species definition for the Modern Synthesis. Trends Ecol Evol. 10: 294–299.
Matthews, M. L. and P. K. Endress. 2004. Comparative floral structure and systematics in Cucurbitales (Corynocarpaceae, Coriariaceae, Tetramelaceae, Datiscaceae, Begoniaceae, Cucurbitaceae, Anisophylleaceae). Bot. J. Linn. Soc. 145(2): 129–185.
McFadden, J. and J. Al-Khalili. 1999. A quantum mechanical model of adaptive mutation. Biosystems 50: 203–211.
McFadden, J. 2001. Quantum Evolution. WW Norton & Company, New York, USA.
Merrell, D. J. 1981. Ecological Genetics. Longman Group Ltd., London , UK.
Mooney, H. A. (ed.). 1977. Convergent evolution in Chile and California. Mediterranean climate ecosystems. Dowden, Hutchinson & Ross, Stroudsburg, Pennsylvania, USA.
Nei, M. 1971. Interspecific gene differences and evolutionary time extimated from electrophoretic data on protein identity. Amer. Nat. 105: 385–398.
Nei, M. 1975. Molecular population genetics and evolution. North-Holland Publishing Co., Amsterdam - Oxford - New York.
Nguyen, Q. H. 2004. A new species of a peltate-leaved Begonia (Begoniaceae) from Vietnam. Novon 14(1): 105–107.
Paterson, H. E. H. 1985. The recognition concept of species. In: Vrba ES, editor. Species and Speciation. Transvaal Museum, Pretoria, South Africa. pp. 21–29.
Pearson, K. 1926. On the coefficient of racial likeness. Biometrika 18: 105-117.
Peng, C.-I, Y. M. Shui, Y. Liu, and S. M. Ku. 2005a. Begonia fangii (sect. Coelocentrum, Begoniaceae), a new species from limestone areas in Guangxi, China. Bot. Bull. Acad. Sin. 46: 83–89.
Peng, C.-I, S. M. Ku, and W. C. Leong. 2005b. Begonia liuyanii (sect. Coelocentrum, Begoniaceae), a new species from limestone areas in Guangxi, China. Bot. Bull. Acad. Sin. 46: 245–254.
Podani, J. 1980. Computer programs for ecological and taxonomical classifications (in Hungarian). Abstracta Botanica 6: 1–158.
Podani, J. 1984. SYN-TAX II. Computer programs for data analysis in ecology and systematics. Abstracta Botanica 8: 73–94.
Podani, J. 1988a. SYN-TAX III. A package of programs for data analysis in community ecology and systematics. Coenoses 3: 111–119.
Podani, J. 1988b. Graphics routines for SYN-TAX III. Abstracta Botanica 12: 183-188.
Podani, J. 1988c. SYN-TAX III. User's Manual. Abstracta Botanica 12. Suppl. 1: 1-183.
Podani, J. 1989. SYN-TAX. Computer programs for data analysis in ecology and systematics. J. Classification 6: 273–278.
Podani, J. 1990. SYN-TAX III-pc - Supplement 1: Minimum spanning trees. Abstracta Botanica 14: 1–6.
Podani, J. 1991. SYN-TAX IV. Computer programs for data analysis in ecology and systematics. In: E. Feoli & L. Orlóci (eds.), Computer Assisted Vegetation Analysis. pp. 437–452. Kluwer, The Netherlands.
Podani, J. 1997. SYN-TAX 5.1: A new version for PC and Macintosh computers. Coenoses 12: 149–152.
Podani, J. 1999. Extending Gower’s general coefficient of similarity to ordinal characters. Taxon. 48: 331–340.
Pridgeon, A. M., P. J. Cribb, M. W. Chase, and F. Rasmussen (eds). 1999. Genera Orchidacearum. 1st ed. Oxford University Press, Oxford, UK.
Reitsma, J. M. 1983. Placentation in Begonias from the African continent. In: J. J. F. E. de Wilde (ed.), Studies in Begoniaceae I. Meded. Landbouwhogeschool Wageningen 83(9): 21–53.
Romer, A. S. 1966. Vertebrate Paleontology, Third edition, Chicago: Univ. Chicago Press.
Saitou, N. and M. Nei. 1987. The neighbor-joining method: a new method for reconstructing phylogenetic trees. Molec. Bio. Evol. 4 (4): 406–425.
Sattler, R., and U. Maier. 1977. Development of the epiphyllous appendages of Begonia hispida var. cucullifera: Implications for comparative morphology. Can. J. Botany 55: 411–425.
Shui, Y. M. and S. H. Huang. 1999. Note on the Genus Begonia from Yunnan. Acta. Bot. Yunnan. 21(1): 11–23.
Shui, Y. M. 2002. A new species of Begonia (Begoniaceae) from SE Yunnan, China. Acta. Phytotax. Sin. 40(4): 374–376.
Shui, Y. M., C.-I Peng, and C. Y. Wu. 2002. Synopsis of the Chinense species of Begonia (Begoniaceae), with a reappraisal of sectional delimitation. Bot Bull. Acad. Sin. 43: 313–327.
Shui, Y. M. and W. H. Chen. 2005. New data of sect. Coelocentrum (Begonia) in Begoniaceae. Acta Bot. Yunnan. 27(4): 355–374.
Simpson, G. G. 1944. Tempo and Mode in Evolution. Columbia University Press, New York, USA.
Simpson, G. G. 1951. The species concept. Evolution 5: 285–298.
Smirnov, E. S. 1925. The theory of type and the natural system. Z. Indukt. Abstamm. Vererbungsl. 37: 28.
Smirnov, E. S. 1968. On exact methods in systematics. Syst. Zool. 17: 1–13.
Smith, L. B. and D. C. Wasshausen. 1983. Notes on Begoniaceae. Phytologia 52(7): 441–451.
Smith, L. B., D. C. Wasshausen, J. Golding, and C. E. Karegennes. 1986. Begoniaceae. Smithsonian Contr. Bot. 60: 1–584.
Sneath, P. H. A. and R. R. Sokal. 1962. Numerical taxonomy. Nature 193: 855–860.
Sneath, P. H. A. and R. R. Sokal. 1973. Numerical Taxonomy : The Principles and Practice of Numerical Classification. W. H. Freeman, New York, USA.
Strickberger. 2000. Evolution. 3rd ed. Jones and Bartlett. Sudbury, MA, USA.
Swensen, S. M., J. N. Luthi, and L. H. Rieseberg. 1998. Datiscaceae revisited: Monophyly and the sequence of breeding system evolution. Syst. Bot. 23: 157–169.
Takhtajan, A. 1997. Diversity and Classification of Flowering Plants. Columbia University Press, New York, USA.
Tebbitt, M. C. 2005. Begonias: cultivation, identification and natural history. Timber Press, Portland.
Wan, Y. and B. N. Chang. 1987. A new species of the Genus Begonia from Guangxi. Acta Phytotax. Sin. 25(4): 322–323.
Watrous, L. E. and Q. D. Wheeler. 1981. The outgroup comparison method of character analysis. Syst. Zool. 30: 1–11.
Wilde, J. J. F. E. and J. C. Arends. 1980. Begonia section Squamibegonia Warb.: a taxonomic revision. Meded. Landbouwhogeschool Wageningen 80(12): 412–413.
Williams, D. M., R. W. Scotland, and S. Blackmore. 1990. Is there a direct ontogenetic criterion in systematics? Biol. J. Linn. Soc. 39: 99–108.
Wu, C. Y. and T. C. Ku. 1995. New taxa of the Begonia L. (Begoniaceae) from China. Acta Phytotax. Sin. 33(3): 251–280.
Wu, C. Y. and T. C. Ku. 1997. New taxa of the Begonia L. (Begoniaceae) from China (Cont.). Acta Phytotax. Sin. 35(1): 43–56.
Xu, K. X. 1994. The compatibility concept and compatibility analysis method in cladistics. Acta Phytotax. Sin. 32(4): 380–388.
Zacarias L. M. Talon, W. Ben-Cheikh, M. T. Lafuente, and E. Primo-Millo. 1995. Abscisic acid increases in non-growing and paclobutrazol-treated fruit of seedless mandarins. Physiol. Plant. 95: 613–619.
Zahn, C. T. 1971. Graph-theoretical methods for detecting and describing gestalt clusters IEEE Transactions on computers C-20(1): 68–86.
Ziesenhenne, R. 1971. Typification of Begonia masoniana Irmscher. Begonian 38: 52.
Zomlefer, W. B. 1994. Guide to flowering plant families. Chapel Hill NC, University of North Carolina Press, Chapel Hill, North Carolina, USA.