Shelf Fungus Finale

A little over a year ago I started posting about the shelf fungus that were growing on an oak stump in our neighbor’s yard. In April of this year, the neighbor’s yard crew spreading new mulch detached the shelf fungus from the stump, tossing them into my yard. I collected the remains and posted a slide show summarizing their ten months of visible life. As a finale - before taking the pieces back to the compost pile - I looked at them more closely. The fungus reprocessed the oak stump into a very light-weight, spongy material.

The top of the shelf-fungus looks like it has growth rings. They are not ‘annual’ growth rings like trees since these fungus grew in a 10 month period and actually stayed about the same size after their initial few months.

The underside has a stalk where they were attached to the oak stump and there are fibers where they were ripped away. The undersides are relatively smooth.

I cut a wedge from one of the platters. The growth rings appear to be a surface feature only (i.e. they don’t extend to the interior). The top - where the rings appear - is a lighter colored layer on a brownish interior that appears porous and spongy.

The Wikipedia entry for shelf-fungus mentions that shelf fungus can be used as a wick for an oil lamp. It works! After soaking the wedge I cut in oil, it provided a nice almost smokeless flame as it sat in a saucer of oil. Rather than taking them back to the compost pile I’ll cut the shelf-fungus in pieces to use in the saucer of oil out on the deck. 

It would have been even better for them to continue growing on the oak stump….