When: 2007-09-23

Collection location: Plumas National Forest, California, USA [Click for map]

Who: Chuck Beehner (cbeehner)

No specimen available

Found this growing on a conifer tree, altitude around 6800FT. I’m not sure what it is and would like to know. Did not measure, but it is at least 2FT across and 18IN front to tree. It is about 5IN thick at the base. There are not many of these in the area sighted, I have been hiking for years and this is the first I can remember seeing.
NOTE: It was raining (unusual for this time of year here) the day I took the picture. I’m not sure if this created a glossy top or it was already so.

[admin – Sat Aug 14 02:04:42 +0000 2010]: Changed location name from ‘Plumas National Forest, CA’ to ‘Plumas National Forest, California, USA’


Proposed Names

9% (3)
Recognized by sight
51% (4)
Recognized by sight: Certainly Ganoderma. There is controvery about whether to separate G. tsugae from G. oregonense as separate species. I went with the more conservative choice, since the latest data I can remember lump them together.

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= Observer’s choice
= Current consensus


Add Comment
It’s my understanding
By: Dave W (Dave W)
2010-02-08 20:51:15 CST (-0500)

that Fomitopsis pinicola sometimes acquires a varnished appearance, making it difficult to distinguish from the varnished Ganodermas; especially when wet, like this specimen was reported. Is it that the one seen here is uniformly red (except for the light margin) and too large to be F. pinicola? Just wondering, as the host has been IDed as a type of pine, and here in PA (a fungal world apart from CA) one is hard pressed to find G. tsugae on anything but hemlock.

Looks like host is Pinus species
By: Daniel B. Wheeler (Tuberale)
2008-12-13 21:13:25 CST (-0500)

based on the bark. G. tsugae should be growing on hemlock (=Tsuga); G. oregonense I’ve seen grows mostly on Black cottonwood along the Columbia River. I’m not sure what this is. But most of the Ganodermas were originally described not by differences of spore shape/size but by their host trees. That means I don’t recognize this one.

Ganoderma oregonense
By: Nathan Wilson (nathan)
2007-09-26 01:18:06 CDT (-0400)

Given the size and the growth on conifers and vanished top, I’d call it Ganoderma oregonense. This is based on the description given in Arora’s, Mushrooms Demystified, 2nd Ed.

By: Tim Mickelson (TimMickelson316)
2007-09-26 00:44:44 CDT (-0400)

by no means am i and expert on mushrooms but by researching my books i wanna take a stab at it and see what the others think and hope they let me know if im right but from what ive read and seen by the pictures im gonna guess its a Ganoderma Lucidum and if anyone else feels the same way please let me know