Dryad's Saddle Mushroom (Polyporus squamosus) (See 1st comment)
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The name &quot;Dryad's Saddle&quot; refers to little creatures in Greek mythology called Dryads who could conceivably fit and ride on this mushroom. Another name it goes by is Pheasant's Back mushroom, referring to the pattern of colors on the bracket matching that of a pheasant's back.

The mushroom is commonly found attached to dead logs or stumps at one point with a thick stem. The fruit body will produce a white spore print if laid onto a sheet of paper. They can be found alone, in clusters of two or three, or forming shelves. Young specimens are soft but toughen with age. It is particularly common on dead elm and is also found on living maple trees.

This organism is common and widespread, being found east of the Rocky Mountains in the United States and over much of Europe. It is also found in Australia and Asia. Many mushroom hunters will stumble upon this when looking for morels during the spring as both have similar fruiting times, and this fungus can grow to a noticeable size of up to 50 cm (20 in) across. It plays an important role in woodland ecosystems by decomposing wood, usually elm, but is occasionally a parasite on living trees.

While P. squamosus is certainly not poisonous, it is generally not recognized as an edible mushroom unless the specimens are very young and tender.  The mushroom's smell resembles watermelon rind.  (From Wikipedia)

(Thanks to thedatajunkie for the ID.)
brown texture mushroom fungi treestump polyporussquamosus fz18 dryadssaddlemushroom