part_of part of part of adjacent to scrubland area atmospheric boundary layer area of scrub NLCD:52 As noted in Wikipedia: "Because the criteria are matters of degree rather than of kind, the definition of a subshrub is not sharply distinguishable from that of a shrub" shrub/scrub According to the NLCD 2011, areas of scrub or shrub are dominated by shrubs; less than 5 meters tall with shrub canopy typically greater than 20% of total vegetation. This class includes true shrubs, young trees in an early successional stage or trees stunted from environmental conditions. Such thresholds - which are themselves fuzzy - are not asserted in this definition. nlcd2011 area of shrub An area of a planet's surface which is primarily covered by a shrubs, young trees, or stunted trees.. The surfaces of this area are in contact with an atmospheric column extending from the planetary boundary layer to the planet's exosphere with little to no physical obstruction. bush area