When: 2006-11-12

Collection location: Howarth Park, Santa Rosa, Sonoma Co., California, USA [Click for map]

Who: Debbie Drechsler (debdrex)

No specimen available


This polypore is growing on the base of a bay tree, not near any water. It feels clammy and damp to the touch, but quite solid. It’s 11cm across at it’s widest point and I first observed it on September 6, 2006. Although it hasn’t formed a cap in two months, it did, indeed, stain dark brown when I scraped it with my fingernail.

May 5, 2007: Image 4636. This never grew a cap and languished all year. Recently I noticed that it was fruiting again on top of the original structure which can be seen, in the third photo, underneath the new one.

May 17, 2007: Image 4825. I happened to go by and noticed that the brown is spreading pretty rapidly on this. It measures 14 cm across the widest area.

June 16, 2007: Image 5292. It’s now 15 cm across.

July 12, 2007: Images 5522, 5523. Not much bigger at 15.5 cm but there’s new growth underneath and more brown on top.The white areas remain fresh looking and feeling.

August 27, 2007: Image 6093. 20 cm wide.

September 13, 2007: Image 6233. 21 cm across.

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Add Comment
Great to see the change over time
By: Nathan Wilson (nathan)
2007-05-08 16:01:06 CDT (-0500)

I don’t think I’ve ever seen a time series of the growth of a conk. It would be great to keep seeing regular (monthly?) pictures of this. It definitely looks more like a conk now with the brown center showing.

Polypore on Bay
By: Darvin DeShazer (darv)
2006-11-12 22:20:16 CST (-0600)

The polypore on Bay is usually Ganoderma applanatum. You can identify it by scratching the white area and seeing if it instantly turns deep brown or waiting a week until the polypore gets larger and seeing the color and texture of the cap.

Does it stain?
By: Nathan Wilson (nathan)
2006-11-12 21:55:10 CST (-0600)

If you scratch the white area with your fingernail does it change color?