Postia placenta
The base of this hickory tree has been infected by Postia placenta, a fungus which
brown rot in trees.  The images shown here are of the reproductive stage
Postia placenta, which will produce spores.  December.
Postia placenta
Postia placenta
Postia placenta
Postia placenta
The part of this fungus that "eats" the wood actually penatrates the
wood to break down cellulose to consume the sugars (polysaccharides)
it contains.  Micrograph shows
Postia placenta amongst wood cells.
Image by Thomas Kuster, U.S. Department of Agriculture Forest Service,
Forest Products Laboratory.
See Fungi Europaei, Polyporaceae s.l., E.
Candusso (2005), p. 348.  Listed as
Oligoporus placentus, a former name.
This image shows the pore surface of Postia placenta growing on a log
perpendicular to the ground.  Note how pores also develop
perpendicularly.  The bumpy surface helps with spore dispersal; each
bump acts like a cap, extending the pores outward.
The genome of Postia placenta has been
decoded by an army of scientists:
National Academy of Science