Taxonomic study of Alpinia intermedia complex (Zingiberaceae) in Taiwan and the Ryukyus

• Main Authors: Lin, Yi-Jyun, 林怡均
• Other Authors: Wang, Jenn-Che
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/q6uc56

碩士 === 國立臺灣師範大學 === 生命科學系 === 106 === Alpinia intermedia Gagn. and its related species (including A. chinensis Roscoe, A. kelungensis Hayata, A. oblongifolia Hayata and A. suishaensis Hayata) are distributed in Japan, Ryukyu Islands, Taiwan and mainland China. It is a common herb frequently found in forest and forest edge at low and middle elevation. The taxonomic treatments of A. intermedia complex has been controversial due to minor morphological differences delimiting subgroups with the complex, implying a great necessity to study this complex in detail. In this study, I used the methods of morphometric analysis such as one-way ANOVA, Tukey’s Honestly Significant Difference Test and principal component analysis (PCA), combining with field observation and literature review to untangle the problem of Alpinia intermedia complex in the Ryukyus and Taiwan. The results obtained from one-way ANOVA and Tukey compare analysis show that the reproductive characters, especially the length of stamens / pistil, the size of labellum, and the shape labellum being shortly unguiculate or sessile, instead of vegetative characters, are important characters to separate taxa within this complex. The statistical analysis and principal component analysis both support to separate this complex of Japan, Taiwan and Orchid Island into "The Ryukyus + Orchid Island" and "Taiwan" two groups. We concluded the names for "The Ryukyus+ Orchid island” speciesould be A. intermedia Gagnep, while for "Taiwan" species should be A. oblongifolia.