Surface Structure Characteristics.

Surface structure characteristics, as measured on scanning electron micrographs. : number of edges in the closest equivalent polygon; : longest regular distance between primary granules; : height of granules; : length of the three-phase contact line for the wetting system of one granule; : nominal area of a section of cuticle containing a single granule; nominal surface area of a granule; the final column denotes the presence of overhanging structures. Rows marked * present values based on secondary granules.