This one older cap has much larger pores than younger one (shown below with scale).1/19/15

Polyporus decurrens

Four growing on an Oak log at the Reserve at Rancho Mission Viejo, Orange County, CA. 1/19/15 and 2/7/2015. © Joanne Schwartz.

Several were at least 18cm/7" across, with very large pores running down stipe/stem


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Black along stipe/stem is wood from decayed Oak branch.1/19/15

Younger specimen,


Younger specimen, 2/7/2015

Closeup of angular pores of younger specimen. 2/7/2015