|Common Split Gill mushroom, Schizophyllum commune|
When the weather is dry, it folds those lace petticoats underneath to conserve moisture. In wet weather, (which we've been having plenty of) it fans out again.
|The same mushroom, with another, smaller one.|
Schizophyllum commune is easily recognized. Its tiny fruiting bodies lack stems, and they attach themselves like tiny bracket fungi on the dead wood of deciduous trees. Unlike a bracket fungus, however, Schizophyllum commune has what appear to be gills on its underside, rather than pores or a simple, flat surface. On close inspection the "gills" turn out to be merely folds in the undersurface--and they are very distinctively "split" or "doubled" (enlarge the illustrations). (Mushroom Expert.com)
This mushroom grows all around the world, year-round, so there are many photos on the internet. However, almost all of them show the underside, the split "gills". Even my trusty Guide shows only photos taken from underneath. A pity; those lacy skirts are too glorious to be passed by like that!