A biodiversity is an important principle on the processing of a life, and also a fundamental biological resources for the maintenance of life-support system and the economic development of human being. Human beings enjoy their life and create their arts throughout the nature. Because we, human being, are only an organism and a cultural species being based on the nature, It is certain that our life can`t be continued without the mutual relationship with the nature. But, it is real thing that the exhaustion of biological resources is deeping more and more around the world by the growth of human population and the economic development. On these respects, it is very important that we are searching, protecting and upbring the biological resources. These are an extremely urgent things in the times which the international agreements of anticipating a war of biological resources is considered as an important issue. If international agreements about biological resources come into effect, the situation will be deteriorated, compared to the present. Therefore, it is necessary that we should research our own plants, especially “endemic plants”, at this moment. Endemic plants in korea were first known to the world by German explorer, B. A. Schlippenbach in 1854. He collected about 50 plants and sent them to Netherlands botanist F. A. W. Miquel during 1811-1871. Among them. Rhododendron schlippenbach and Salix koreensis was reported as endemic plants in Korea. After that, many scholars in and outside Korea had studied them for 150 years. In 1952, T. Nakai generally divided them into 1,118 taxa including 642 species, 402 varieties and 74 formae, which was accepted uncritically for a while, but is not accepted any more because they were too subdivided. Also, although there are the requirements for re-examination in the taxonomy system. those are not easy under the situation of partitioned Korean peninsular. In order to solve these problems, W. T. Lee scrutinized thoroughly the 61,588 specimens of Korean vascular from 1984 to 1985, which were owned by the University of Tokyo, Kyoto University and science museums in japan, and he divided them into 4,003 taxa. Being