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A Taxonomic Study on Korean Allium L. Based on the Morphological Characters  

Choi, Hyeok-Jae (Division of Forest Biodiversity and Herbarium, Korea National Arboretum)
Jang, Chang-Gee (Department of Biology Education, Kongju National University)
Lee, You-mi (Division of Forest Biodiversity and Herbarium, Korea National Arboretum)
Oh, Byoung-Un (School of Life Science, Chungbuk National University)
Publication Information
Korean Journal of Plant Taxonomy / v.37, no.3, 2007 , pp. 275-308 More about this Journal
Abstract
For 20 taxa of Korean Allium, including 16 species and 5 varieties, examined were morphological characters (i.e. sexuality, structure and shape of underground part, types and growing patterns of leaf and scape, and shapes of perianth, filament and pistil). The specialization and the evolutionary trends of taxonomic characters were inferred from morphological examination. Taxonomic relationships and system of Korean Allium were also studied. The characters showing evolutionary trends were the structure and shape of underground part including rhizome and bulb, leaf, scape, inflorescens, filament and ovary. It seemed that thin and short rhizome developed from thick and long one, and the membranous simple bulb tunic evolved into fibrous reticulate one. The presence of hyaline sheath in A. monanthum of sect. Microscordum was apomorphic. Both angular leaf blade with 2-rowed vascular bundle and flat blade with 1-rowed vascular bundle were developed from terete one with 2-rowed vascular bundle. The base of filament have differentiated from entire to toothed, and 2-ovuled ovary as well as erect scape before flowering was plesiomorphic type. In addition, sexuality, structure of underground part, the presence of hyaline sheath and cross-section structure of leaf were taxonomic characters with the level of the subgenus in this genus. Shape of rhizome, bulb, leaf, scape and pedicel discriminated each section from other ones in the subgenera easily. The shape and arrangement of perianth and filaments were the diagnostic characters for species level along with shape of ovary and stigma.
Keywords
Allium; diagnostic characters; evolutionary trend; morphological characters; taxonomic relationships;
Citations & Related Records
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