| Summary: | 碩士 === 國立臺灣師範大學 === 生命科學研究所 === 92 === The quillwort（Isoetes sp.）was found in the Tai-Wu mountain area in Kinmen National Park, it’s original source is still unknown. In this study, the characteristic of this quillwort was studied by analyzing with morphology, anatomy and its spores. The results showed that the morphology of this quillwort is: leaf length between 9-18 cm, corm with 2-3 lobes and chromosomes are 2n =22. The quillwort has rugulate, 250-310 μm megaspores and echinate, 32-34 μm microspores. It revealed that the quillwort in Kinmen is different with others in neighbor area of Asia in morphology. The physical and chemical factors of its nature habitat were also investigated, including water quality, light intensity, temperature, and the characteristics of flora and fauna, which were compared with the growth of the quillwort for understanding the relationship. Its nature habitat is very small and ecological environment is often changed, which is easily affected by climate. The disadvantage to this quillwort was unstable water supply, eutrofication of water and too much organic substance in soil. For the conservation of the quillwort, the in-situ and ex-situ conservation method and technique were evaluated. The strategy of the conservation for the quillwort and its nature habitat was suggested. The results of this study could be the reference of the management for the conservation of the quillwort in Kinmen National Park.
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