These are all plants that require fire to survive and reproduce successfully. Without fire, none of these plants would have been in the stand of trees. They would have died out. Most of the pictures came from one 10-15 acre portion of a larger tract of Longleaf Pine-Grass ecosystem. You don't see all of them at any one time. These were taken at different times of the year and during different years between prescribed burns. The species diversity is quite high. The pine woods here burnt every 7-11 years by lightning caused fires for a good many thousand years before man arrived in North America. Nature didn't care about houses and there weren't any until man arrived and started a housing boom. Now, using prescribed burn (one with a specified purpose, under pre-specified weather conditions, soil moisture, and time of year with the proper type of fire (backing, head, or flanking) man can help restore the natural species mix.