Observation 119420: Ganoderma sessile Murrill
When: 2009-08-29
No herbarium specimen

Proposed Names

40% (6)
Recognized by sight: Does not fit G.lucidum morphologically, G.lucidum is not known to occur from North America.
37% (6)
Recognized by sight: Red laccate top indicative of Ganoderma sp.
43% (5)
Used references: Type collection is from New York (1897). ‘Sessile Ganoderma’ Growth pattern: dimidiate, sessile, imbricate, connate. The superimposed growth may be distinctive. http://www.cybertruffle.org.uk/...
-14% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Here is some information.
By: MSchink
2015-01-13 06:47:48 EST (-0500)

Taxonomy of Ganoderma from southern South America:
subgenus Ganoderma, Fig 1. A nice illustration of the cells of the pileipellis for various species.Including the holotype of Ganoderma sessile, which can be found at the New York Botanical Garden # 00985711

Here is their description of G.sessile including a microscopic description.

Ganoderma sessile Murrill, Bull. Torr. Bot. Club. 29: 604.
1902. (Figs 1, 26)
Basidiome variable, with wrinkled, corky to woody, dimidiate,
sessile pileus sometimes imbricate, conchate to ¯abelliform,
thickening towards the base, margin thin, 5±15¬7±25¬
1±3 cm; pileus surface glabrous, laccate, dull to semidull,
radially rugose, concentrically sulcate, yellowish to reddish
brown, ®nally dark brown, with alternating bay and ochraceous
zones; margin generally thin and acute, frequently curved
inwards, rarely truncated, soft, concolorous ; context thin
2±5 mm, soft corky or woody, radially ®brous, concentrically
zonate, ochraceous ; tubes 8±10 mm long, concolorous with
the context. Pores 4±5 mm−", brown inside, mouths circular or
angular, white or greyish brown, dissepiments entire. Cutis of
the hymeniodermis vera type, with cylindric, smooth elements,
60±75¬7±10 lm, IK­ (greyish). Basidiospores ovoid, pine
kernel-like, smooth, pale, 12±16¬6±8 lm; under SEM with
very short pillars, slightly exceeding the spore surface.
Chlamydospores sometimes present.

Selected lectotype : U.S.A., New York, Bedford Park, on Quercus
trunk ; leg. ? ; date : ? (cf. Murrill, 1908) (NY!).
Material studied : 228, 1009, 2288, 2372, 2373, 2815, 2378, 445?,
2221?, 34352?

In Murrill’s original description no type was indicated, but
later (1908), he cited New York as the type locality. Haddow
(1931) studied original materials, and was aware of Murrill’s
changes, which allowed the inclusion of stipitate specimens
(Murrill, 1908, 1915). Ryvarden (1985) selected as neotype
the preceding material, and Moncalvo & Ryvarden (1997)
considered it as a super¯uous neotype. Nevertheless, New
York is the chosen type and this material coincides with the
diagnosis. Since Steyaert (1972) synonymized G. sessile with
G. resinaceum, this erroneous position was followed by many
authors. Both specimens are different enough to maintain
them independent. For instance, under light microscopy their
spores have different ornamentation, but under SEM they
differ in pillar height, although their density and thickness is
apparently similar. We have followed Murrill’s position and
considered them as separate species

The type specimen.
By: MSchink
2014-11-03 19:00:29 EST (-0500)

Of Ganoderma sessile was collected in White planes NY in May of 1897 by Lucien Underwood. This specimen resides in the New York Botanical Garden. It has type stamped on the label. It was one of several specimens explicitly mentioned in Murrill’s original description of the species.Specimen #: 00985711

I am confused
By: MSchink
2014-10-22 12:19:15 EDT (-0400)

As to the status of the type specimen for Ganoderma sessile.A study I was reading the other night makes mention of a different specimen being the type one from New York. But it did not label it with any useful information to track it down with.

I know mycobank makes mention of the specimen collected by Underwood in Greencastle Indiana. I would like to figure out the deal with the New York specimen. Any information is appreciated.

This is the study that makes mention of the New York specimen. (Taxonomy of Ganoderma from southern South America:subgenus Ganoderma)

Herbert Baker is correct, the North American species in the resinaceum complex group together on their own branch distinct and separate from the European resinaceum. With Ganoderma sichuanense (Asia)on a secondary branch from the North American side. I tried getting some sequences from G.sessile off from Genbank but they are very short and create an odd set of branches but depending on whether they were properly identified and how you interpret the tree Ganoderma sessile seems to be the appropriate name for most of North American resinaceum members. The G.resinaceum group also occupies its own branch distinct from G.lucidum group, and G.curtisii group. Indicating that grouping all red laccate Ganoderma together into one group is misguided.

send me a bit…
By: Richard and Danielle Kneal (bloodworm)
2014-09-30 00:42:46 EDT (-0400)

ill do micro and dna, if necessary…

I have 2x-4x microscope only.
By: Andrew Khitsun (Andrew)
2014-09-30 00:33:24 EDT (-0400)

I got it to look at lichen features, which look very nice and detailed under that magnification. But looking at spores requires something more powerful of course…

American names
By: Erlon (Herbert Baker)
2014-09-30 00:31:20 EDT (-0400)

I would certainly prefer any american name over the conflated European counterpart for our native species. The clades are pretty easy to separate once you take the host into account and the slightly variable but unique morphological features. There is much more to learn of course, but we get closer each time we have these types of discussions. Keep up the great work everyone!

disagree w/ what…?
By: Richard and Danielle Kneal (bloodworm)
2014-09-30 00:28:40 EDT (-0400)


you want to argue with the 2 dozen papers (or so) that have already been published…that say the exact opposite, of you…??

I will
By: MSchink
2014-09-30 00:22:28 EDT (-0400)

agree to disagree and nothing more.

By: Richard and Danielle Kneal (bloodworm)
2014-09-30 00:18:18 EDT (-0400)

“There is plenty of literature out there on these species and their morphology, you can get them to groups of related species without a microscope. To determine which individual species for most you will need to do microscopy and sometimes even sequencing.”


By: Richard and Danielle Kneal (bloodworm)
2014-09-30 00:16:40 EDT (-0400)

ill look at it…

unless, you can do micro MS…???

I can serve as an arbiter here,
By: Andrew Khitsun (Andrew)
2014-09-30 00:04:49 EDT (-0400)

by breaking off the piece of this fungus and sending it to whomever can ID it from microscopy :-)

By: MSchink
2014-09-29 23:52:18 EDT (-0400)

It is not at all impossible to place certain species into groups and some of them are distinct enough to ID to species from macromorphology alone, such as G.tsugae. There is plenty of literature out there on these species and their morphology, you can get them to groups of related species without a microscope. To determine which individual species for most you will need to do microscopy and sometimes even sequencing.

im aware…
By: Richard and Danielle Kneal (bloodworm)
2014-09-29 23:40:28 EDT (-0400)

but, you should at, THE VERY LEAST…have microscopy to propose names with such confidence and therein, lies my point.

you, obviously…didnt, get it…

the names you are using to describe these species w/o evidence is ridiculous.

there are numerous papers on the subject…all of them, are completely opposed to what you are trying to do.

and, they have been published…

try something other than macrodiagnosticating…

By: MSchink
2014-09-29 23:36:25 EDT (-0400)

The laccate top surface was enough to distinguish these from Ischnoderma, which has a different texture. These specimens are morphologically consistent with specimens from North America under the names G.lucidum which were shown through molecular studies to fit in the G.resinaceum group. Which consists of several species worldwide, all with similar sessile morphology.

By: Richard and Danielle Kneal (bloodworm)
2014-09-29 23:14:06 EDT (-0400)

my mistake. ;)

Added yet another photo – end of September 2014 (bottom)
By: Andrew Khitsun (Andrew)
2014-09-28 22:22:14 EDT (-0400)

Sporing profusely.

Added this year’s images (5-7 from top)
By: Andrew Khitsun (Andrew)
2014-09-12 00:43:44 EDT (-0400)

No, it didn’t produce any resin :-(

By: MSchink
2014-09-10 21:02:19 EDT (-0400)

From what I understand there has been some disagreement among mycologists for the last 100 years in regards to whether or not lucidum occurs in North America.Steyaert in 1980 concluded based on spore features that no North American species fit the description of G.lucidum. Modern molecular studies seem to agree. Ganoderma curtisii does have a stipe but can be distinguished readily from tsugae due to its color,size and internal context texture.Curtisii is usually rather small,with a yellow cap,sometimes red. Tsugae is found more in the Northern states on conifer, larger and with a soft white context. It is my opinion that this mushroom (#119420) fits in with North American G.resinaceum based on morphology. It often produces a yellow resin, but this is not reliable as sometimes the same specimen will not produce the resin. However I am unaware of another Ganoderma that might produce the resin so the presence of the resin may be a good indication of resinaceum.

Tom Volk disagrees
By: Andrew Khitsun (Andrew)
2014-09-10 20:28:46 EDT (-0400)

Here is his article on the topic:

But that is almost 10 years old, so maybe it wasn’t updated or something. I looked just morphologically, and it seems like G.curtisii is shown to be a stalked species just like G.tsugae. However, I found many a photo of supposed G.resinaceum, including on MO, including my other observation 145918. All the rest of the species mentioned below don’t seem to apply in this situation. Also, what about that yellow resin the species is supposed to produce? Or is it not defining characteristic?

Many Ganodermas. Just not lucidum.
By: MSchink
2014-09-10 02:22:28 EDT (-0400)

A member of the G.resinaceum group grows very prolifically in the Northern states to about Montana and south. There is also a potentially different resinaceum species on the west coast. In the East you have Ganoderma curtisii, at least two forms. In Florida on palm you have Ganoderma zonatum. In the southern states on specifically pine trees you will find a similar mushroom to G.tsugae called G. mereditiae. There is also an applanatum look alike in the Pacific Northwest by the name G.brownii. There may be a number of possible undescribed species as well.

Can have a specimen sent to whomever wants to try their luck.
By: Andrew Khitsun (Andrew)
2014-09-10 00:20:57 EDT (-0400)

So we are told that both G.lucidum and G.resinaceum are not North American and shouldn’t be here. Now what DOES grow here? (apart from G.applanatum which is different and G.tsugae which grows on conifers).

By: MSchink
2014-09-09 19:45:33 EDT (-0400)

Red laccate surface indicates Ganoderma, sessile with multiple caps overlapping is common in G.resinaceum. Being in North America it is not G.resinaceum sensu stricto but the North American variety fits phylogenetically in the G.resinaceum group. Ichnoderma resinosum has a felt like texture not laccate.

Four stages of the same fruitbody.
By: Andrew Khitsun (Andrew)
2012-12-08 23:29:00 EST (-0500)

The upper one is the most developed, of course. (Disclaimer: the bottom two were taken in the fall of 2008, and have never reached maturity the same year; in 2009, the growth began again, but I missed the early stages; so here I compiled early stages from one year with the later stages from another)

Created: 2012-12-08 23:24:32 EST (-0500)
Last modified: 2015-01-15 22:13:20 EST (-0500)
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