 Scheyville National Park is of State significance for the rarity of several of its constituent elements.The naturally vegetated areas of the national park represent the most extensive remnant of vegetation on Wianamatta Shale remaining on the Cumberland Plain, notably the Cumberland Plain Grey Box/ Ironbark Woodland (listed as an endangered community under the Threatened Species Conservation Act 1995), as well as Castlereagh Scribbly Gum Woodland and Shale/Gravel Transition Forest.The national park protects three threatened native plants and a number of regionally rare plant species.