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The taxonomic consideration of petal and sepal micromorphology in Lycopus L. (Mentheae-Lamiaceae)  

Moon, Hye-Kyoung (Laboratory of Plant Systematics, Department of Biology & Research Institute for Basic Sciences, Kyung Hee University)
Hong, Suk-Pyo (Laboratory of Plant Systematics, Department of Biology & Research Institute for Basic Sciences, Kyung Hee University)
Publication Information
Korean Journal of Plant Taxonomy / v.34, no.4, 2004 , pp. 273-285 More about this Journal
Abstract
A comparative micromorphology of petal and sepal of 15 species of Lycopus was undertaken to assess their usefulness in species identification and to evaluate their significance in the taxonomy using scanning electron microscope and stereo microscope. Five types of trichome are found within the genus: unicellular cylindrical trichome, unicellular trichome with papillae, simple multicellular trichome, capitate glandular trichome, and peltate glandular trichome. The types, distribution, and density of the trichomes show considerable variation among the taxa. The distributional pattern of the unicellular cylindrical trichomes on inner side of corolla is differed among the investigated taxa, and can be classified into four patterns. The apex shape of sepal and the incised position of calyx are also various and be recognizedas four patterns. The shape of cell composing in both outer and inner sides of petal and sepal are shown variously. Finally, the taxonomic significance of micromorphology of the petal and sepal in identification and elucidation of the genus Lycopus, especially among the species is also briefly discussed.
Keywords
Petal and sepal micromorphology; Lycopus; Mentheae; Lamiaceae; SEM;
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