When: 2017-11-03

Collection location: State Game Lands 38, Pennsylvania, USA [Click for map]

Who: Chris Foss (The Vault Dweller)

No specimen available

I was very excited to see this. I’ve found G. tsugae MANY times and G. curtisii once, but never G. lucidum. It’s clearly that since this is no conifer (tsugae) and the mushroom itself has no stalk (curtisii). I’d like to add this is considered a parasite yet the tree is clearly well passed dead. It’s not only lost all it’s leaves, but it’s branches and most of the trunk (note picture). I do know that internally trees can survive a lot longer than they’d appear from the outside, but I find that difficult to believe from this example. Maybe it’s a saprophyte?


Proposed Names

-7% (2)
Used references: National Audubon Society Field Guide to Mushrooms of North America
30% (2)
Recognized by sight
26% (1)
Recognized by sight: Over all form is similar to G.tsugae. Which will on rare occasions fruit from hardwood trees.

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= Observer’s choice
= Current consensus


Add Comment
Glad to help!
By: Matthew Schink (MSchink)
2017-11-10 21:30:15 -05 (-0500)

If its sessile you want, it would be better to look in urban or suburban environments. Especially towns with streets lined with maple trees. G.sessile’s habitat is skewed more towards human occupied places. Where it proliferates due to its unique sessile growth habit. Look for stumps, or places along the street where there are gaps that used to have trees. Sessile can often be found growing on the buried remnants of the stumps and roots. It grows well in this environment because it lays flat to the ground and can mostly avoid lawnmower blades.

By: Chris Foss (The Vault Dweller)
2017-11-10 20:32:38 -05 (-0500)

Glad to have your insight. Let me clarify.

I DID cut one of the shelves open, but didn’t take a picture of the inside (I normally do with other mushrooms). It was mostly white with some brown rings. I actually recognize that from some G. tsugae I found this Summer and for which I did take pictures:



I suppose that solves the riddle doesn’t it? You know as someone who has found plenty of G. tsugae I should be glad I found it growing on something other than Hemlock, but I’d really rather it be that I found G. sessile for the first time.

Cross section
By: Matthew Schink (MSchink)
2017-11-07 04:10:09 -05 (-0500)

Ganoderma lucidum is not naturally occurring in North America and does not grow in Pennsylvania. G.sessile is the species that tends to lack a stem, though it will sometimes grow with a stem, G.lucidum itself is almost always stipitate.

A cross section should be done of this mushroom, if it has a brown flesh then G.sessile is the likely ID but if it has a white flesh it is G.tsugae regardless of which tree it is on. I have found tsugae myself on both Oak and Maple, the Oak was along side many Hemlock, but the Maple was in a forest with no conifers for several miles. Both collections are most definitely G.tsugae, confirmed via white flesh and microscopy.

Created: 2017-11-04 20:46:44 -05 (-0500)
Last modified: 2017-11-07 04:07:03 -05 (-0500)
Viewed: 61 times, last viewed: 2019-10-13 03:49:12 -05 (-0500)
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