🚀 go-pugleaf

On Sunday I took two nephews hiking a nine-mile section of the Florida 
Trail, and we saw some curious plants which I'd like to identify.  We 
were sharing the military Camp Blanding (in N-Cen. Fla) with oodles of 
deer hunters--don't worry, we wore our orange vests--and, on the forest 
floor S. of Lowrey Lake we saw large patches of dirty-whitish growths, 
like connected puffballs, but porous, resembling marshmellow sponges.  I 
thought they were some kind of lichen, maybe, without chloraphyl or 
whatever it is that works with photosynthesis to make plants green.  
Actually, some patches of them had a faint green tinge, like a very pale 
sage green.
 
Can anybody give me the scientific name and the popular name (if there is 
one) for what we saw?