The degree of green naturality(DGN), standing crop and productivity were estimated in Chungbuk, Chunbuk and Kyungnam district from April, 1988 to October, 1988, as a part of the National Investigation of Natural Ecosystems in Korea, which have been accomplished under the guidance of Office of Environment, The average DGN of Pusan, Chungbuk, Chunbuk and Kyungnam were estimated as 3.32, 5.41, 4.48 and 4.95, respectively. The standing crop and productivity of Pusan were estimated as 1,438,290ton/㎢ and 331,810ton/㎢/year, and those of Chungbuk were 35,871,380ton/㎢ and 7,117,770ton/㎢/year, those of Kyungnam were 58,606,580ton/㎢ and 11,259,070ton/㎢/year. The flora of Chungbuk were consisted of 1,224 kinds which were arranged as 128 families, 535 genera, 1,149 species, 69 varieties, 13 forms and 1 subspecies, and that of Chunbuk were 1,273 kinds arranged as 131 families, 564 genera, 1,209 species, 60 varieties and 13 forms, that of Kyungnam including Pusan were, 1,774 kinds arranged as 139 families, 689 genera, 1,654 species, 91 varieties, 28 forms and 1 subspecies.