Complex sentence: The older, central region is covered with red, spherical to cylindrical granules; moving outwards from the center, zones of color may be distinguished, the first gray-green, the second white, and finally a bright red cottony rim.
Split into simpler sentences: The older, central region is covered with red, spherical to cylindrical granules. Moving outwards from the center, zones of color may be distinguished, the first gray-green, the second white, and finally a bright red cottony rim.