Polyporus varius
The species epithet "varius" fits this polypore very well, as it can exhibit
many different cap variations.  The collection shown here represents the
form with a radially streaked cap and reddish brown colors.  Usually
found during summer and fall.  Grows from branches and sticks near
gullies and other areas that remain moist during dry weather.
See Mushrooms Demystified,
Arora, 1986, p. 563.

Polyporus varius at