Observation 175793: Ganoderma tsugae Murrill
When: 2014-08-30

Notes: Hardwood area. No conifers in sight. Beech, birch, maple. Looked like maybe birch was the host.

Given the dubious status of the name “lucidum” as applied to NA material… I’m at a loss here!

Proposed Names

50% (3)
Recognized by sight
54% (4)
Recognized by sight: Skin has a very nice shine to it, context a very light white to cream blending into a light brown just above a light brown set of pore tubes. Interesting to note it may not have been on a conifer.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks MSchink.
By: Dave W (Dave W)
2015-01-27 17:15:12 PST (-0800)

Looking forward to more info on this interesting collection.

By: MSchink
2015-01-27 10:18:31 PST (-0800)

Hyphal system dimitic

Spores roughly echinulate.

7 [8.1 ; 8.7] 9.8 × 4.5 [5.4 ; 5.8] 6.7 µm
Q = 1.2 [1.4 ; 1.6] 1.8 ; N = 22 ; C = 95%
Me = 8.4 × 5.6 µm ; Qe = 1.5

8.72 x 5.69
9.18 x 5.73
9.82 x 6.16
7.56 x 4.09
8.04 x 4.69
8.83 x 5.62
7.99 x 5.85
8.36 x 6.04
9.25 x 5.55
9.53 x 5.87
9.31 x 5.82
9.07 x 5.93
8.47 x 6.22
8.21 x 5.96
8.16 x 5.65
7.50 x 5.55
8.38 x 5.33
7.84 x 5.96
7.18 x 5.77
7.77 x 4.30
8.55 x 5.53
7.56 x 5.68

Measured from the inside spore wall, spores are consistent with measurements from tsugae on hemlock I measured, though are slightly smaller than the original description for tsugae. (9-11 × 6-8) Murrill.

I have also sent a piece of the stipe off for sequencing and am waiting on the results.

By: walt sturgeon (Mycowalt)
2014-09-08 10:40:10 PDT (-0700)

I found this one (134974) on yellow birch. It was indistinguishable among the very abundant G.tsugae.

It seems a pretty good case…
By: Dave W (Dave W)
2014-09-08 07:01:56 PDT (-0700)

is being made for G. tsugae. Also, if it’s possible to obtain molecular evidence from the specimen seen in this obs, then we get support for the G. tsugae on birch hypothesis. Very interesting.

The exact collection site for this obs is unfortunately well off the defined trail. I doubt I can find this spot.

By: MSchink
2014-09-08 03:13:31 PDT (-0700)

Found in the description of G.meredithiae on this very site.

“Ganoderma tsugae occurs mainly on conifers and occasionally on birch in northern latitudes.”


I have been in correspondence with people who have also found it on birch, and I have no reason to not believe them. Ganoderma curtisii can also be found growing on spruce in Massachusetts. Ganoderma may prefer certain tree types but I think it is flawed to presume it is completely restricted to them.

Modified concept.
By: Dave W (Dave W)
2014-09-07 17:50:53 PDT (-0700)

Visited the collection area today… not the exact same spot where this obs was made. Looked around some hemlocks for a G. tsugae. The one specimen I managed to find bears quite a resemblance to the one seen in this obs 175793). Link to new obs is obs 177264 .

I surmise that my concept of G. tsuage is influenced by the time that I generally seek to observe this species, mid June. The fruit bodies that are emerging at this earlier time typically show more variation within the bands of color on the varnished up-side. Also, the underside tends to be more uniformly white and without the raised fertile margin.

I wonder how long the one in 177264 has been growing?

By: Erlon (Herbert Baker)
2014-09-06 00:47:36 PDT (-0700)

Hi Mike, If you read the paper “Phylogenetic analysis of Ganoderma based on nearly complete mitochondrial small sub-unit DNA sequences.” that you have included as a reference, you will see the ‘Tsugae group’ is host specific to conifer(phylogram, figure 3). Most of the strains labeled G. lucidum from the U.S. fall into the ‘Resinaceum group’, which is made up of no less than six distinct species, worldwide (phylogram, figure 3).

The following is a list of the publications I have read.
By: MSchink
2014-09-05 19:48:10 PDT (-0700)

Phylogenetic analysis of Ganoderma based on nearly complete mitochondrial small sub-unit DNA sequences.

Morphological and genetic characteristics of different collections of Ganoderma P.Karst species.

Ganoderma on trees-differentiation of species and studies of invasiveness.

Ganoderma ryvardense sp.nom associated with basal stem rot (BSR) disease of oil palm in cameroon.

Studies of some biological characteristics of sprorophore of Ganoderma lucidum (Leyss.EX.FR) Karst in culture.

Ganoderma multipileum the correct name for ‘G.lucidum’ in tropicala Asia.

The species identity of the widely cultivated Ganoderma. ‘G.lucidum’ (ling Zhi) in China.

Study of some Ganoderma species. R.L Steyaert.

There are several others that I have wanted to read but do not have access to. I have read every publication I could find on Ganoderma in the last 6 months. I would like to get more involved but I do lack a proper microscope. I am sorry we have come to a different conclusion.

By: Richard and Danielle Kneal (bloodworm)
2014-09-05 19:14:01 PDT (-0700)


what publications?

edit: comment intended for MSchink

Morphology on this one..
By: Dave W (Dave W)
2014-09-05 19:12:27 PDT (-0700)

does not fit my own concept of G. tsuage (previous comment). Also, it was found in a habitat not matching what is expected with this species.

I have read
By: MSchink
2014-09-05 18:54:10 PDT (-0700)

Several papers. I disagree that macro morphology is useless.If I can get a culture from this I will send it off to be sequenced.I feel you can get a very good idea of where the mushroom fits using its morphological characteristics. They do have distinct traits among the species. I think the main reason people consider the morphology useless is because many Ganodermas have been miss labeled. For this reason I do not trust entries in the Genbank database labeled as G.lucidum.I do however trust the ones labeled as G.sichuanense,G.multipileum, and G.resinaceum. I also think that there are multiple species names being applies to single Ganoderma species, this is something I hope more sequencing can help clear up.

macro morphology…
By: Richard and Danielle Kneal (bloodworm)
2014-09-05 18:23:26 PDT (-0700)

is pretty much useless when it comes to Ganoderma…

if you want to speculate on a species, you need either microscopy or DNA…most likely, both.
this has been proven time and time again and published in numerous papers.

if you aren’t willing to take the time to read these papers…
you should not be “calling it” anything other than, Ganoderma.

Rickett’s Glen…
By: Dave W (Dave W)
2014-09-05 17:18:42 PDT (-0700)

which is the collection site, produces large annual fruitings of G. tsuagae. There are so many old-growth hemlocks that are in bad shape, and many recently dead. So I see lots of G. tsugae at this general location.

There are a two differences that I believe to see regarding the G. tsugae and the one in this obs.

1. G. tsugae often has a long neck when young. But in this state the cap generally has the bands of color, with areas closer to the margin pale.

2. On this obs, the underside has a brown fertile marginal border.

Adding MSchink’s photo of the cross-sectioned fruit body.

By: MSchink
2014-09-05 16:19:30 PDT (-0700)

Here is a photograph showing various North American Ganodermas in cross section. This observation is clearly most similar to Ganoderma tsugae. Tree host is not a reliable identification method as many Ganodermas can grow on both conifer and hardwood,applanatum mixes hosts often. To be more certain you have to look at its morphology. I do not think I can get a culture out of this specimen as dried tsugae does not take well. Otherwise I would offer it for sequencing. The only other Ganoderma I am aware of with similar context is G.oregonense, which does not occur in PA. It is my conclusion this specimen is Ganoderma tsugae.

These are from my own personal Herbarium collection.


The area where this was found…
By: Dave W (Dave W)
2014-09-05 10:28:16 PDT (-0700)

is an old-growth woods where the remains of a single hemlock that died in-situ is a possibility. The forest transitions back and forth from mixed deciduous to mixed hemlock/deciduous.

It seemed like the stump from which this appeared to be growing was an old birch.

Soft white flesh.
By: MSchink
2014-09-04 13:08:52 PDT (-0700)

After examining this specimen close up, I have come to the conclusion that it is Ganoderma tsugae. Very interesting then that no conifers were reported in the area. I have heard of people finding tsugae rarely on other woods. The flesh is a soft foam like consistency, good clean white easing into a light brown just above the pores which are a light brown as well.

Very interesting.
By: MSchink
2014-08-31 20:02:56 PDT (-0700)

It may be either G.resinaceum or G.curtisii. It shows characteristics of both.There have been several mushrooms suspected of being G.curtisii found in that general area lately so it may be part of a population.

Created: 2014-08-31 14:29:07 PDT (-0700)
Last modified: 2016-08-10 09:10:34 PDT (-0700)
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