When years of environmental research center, 2545 (2002) (Toyota Foundation) Khon Kaen University found that more than 80 percent of the plant, which is the element in the Dry Dipterocarp Forest of the Northeast. Can be found in the Khon Kaen University and still a variety of wood species are quite high, which contains several species of native trees, such as Golden shower, Dipterocarpus tuberculatus, Sindora siamensis but in a year, 2549 found that some species of rare plants. Several are missing is consistent with research that the diversity of plants is the identifier indicates the abundance of the environment and ecosystems. If the diversity of the plants decreased, showing that the abundance of the environment has decreased. From this research can be said that the green area of Khon Kaen University has the decreased.