Taxonomic Studies of the Diplazium mettenianum Complex (Woodsiaceae; Pteridophyta) in Japan: Morphology, Cytology and Taxonomy of Plants with Normal-Shaped Spores |
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| Authors: | Noriko Ohta Masayuki Takamiya |
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| Affiliation: | (1) Department of Environmental Science, Graduate School of Science and Technology, Kumamoto University, Kurokami 2–39–1, Kumamoto, 860–8555 Japan, JP;(2) Department of Environmental Science, Faculty of Science, Kumamoto University, Kurokami 2–39–1, Kumamoto, 860–8555 Japan, JP |
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| Abstract: | Diplazium mettenianum complex, including two polymorphic species D. mettenianum and D. griffithii, with normal-shaped spores collected from 62 sites. An analysis of 20 qualitative morphological characters showed that the complex can be divided into five forms. A statistical analysis of 16 quantitative morphological characters supported the distinctness of five forms which are regarded as independent species: D. mettenianum, D. fauriei, D. deciduum nom. nov. (=D. mettenianum var. tenuifolium), D. griffithii, and D. hayatamae sp. nov. A cytological study on 150 plants showed that D. deciduum and plants in a single population of D. fauriei are sexual hexaploids (2n=6x=246=123ll), and all others are sexual tetraploids (2n=4x=164=82ll). Received 18 May 1998/ Accepted in revised form 3 December 1998 |
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| Keywords: | : Chromosome Diplazium mettenianum Morphology Pteridophyte Spore Taxonomy |
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