Observation 118936: Ganoderma sessile Murrill

When: 2012-09-27

Collection location: Crown Point, Indiana, USA [Click for map]

Who: Danielle B. (dbly)

No specimen available

-multiple shelf like specimen growing on living tree

-103mm in length and 70mm wide

-topside was a burnt red in color with a slimy varnished covering, turned yellow than to a cream color at margin

- underside was a cream color with minute spores on the bottom

- flesh was extremely tough, it took a while to remove it from the tree

- spores were broadly ovate/elliptical in shape, 2 visible walls, with spines

- spore measurements (length/width) (in micrometers) I tried to include the one of the largest and smallest spores I could find along with the majority of the same sized spores that I found. Measured with an 100x oil immersion objective.

1. 12.45/6.64
2. 9.96/5.81
3. 11.62/6.64
4. 9.13/5.81
5. 11.62/6.64
6. 10.79/5.81
7. 10.79/5.81
8. 11.62/6.64
9. 11.62/6.64
10. 11.62/6.64

range (9.13-12.45) and (5.81-6.64)

Proposed Names

-21% (3)
Recognized by sight
Based on microscopic features: similar spore size and shape
33% (3)
Recognized by sight
-26% (2)
Recognized by sight: Sessile nature is common in G.resinaceum. Spores of the smooth type, Ganoderma lucidum has rough spores with prominent echinulae.
Used references: (Steyaert 1972,1980)
81% (3)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
There is also
By: Matthew Schink (MSchink)
2014-10-19 12:16:52 CEST (+0200)

an excellent illustration of the difference between spores in figures 2-3 of Stipes And Spores In Two British Ganoderma Species. in Field Mycology Volume 2(2), April 2001

I think you will find these spores look more like the resinaceum spores than the lucidum.

By: Matthew Schink (MSchink)
2014-10-17 07:26:24 CEST (+0200)

I am using Steyaerts interpretation of rough vs smooth spores. If you read my citation you will see he explicitly makes note that smooth does not mean truly smooth but rather the echinulae are less prominent in resinaceum than in lucidum.

Species of Ganoderma and related Genera mainly of the Bogor an Leiden Herbaria. (Steyeart 1972)

Figure 6 shows clearly the differences between the spores, pg 94 discusses the differences.

Study of some Ganoderma species (Steyeart 1980)
pg 170 Further discussion on the G.resinaceum complex.
pg 183 discusses the distribution of Ganoderma species.


Figure 4 shows both G.lucidum and G.resinaceum spores, G.lucidum spores are clearly distinct.

The distinction of G.curtisii ( a North American taxon) as well as the Asian G.“lucidum” from European Ganoderma lucidum is well supported by genetic sequencing.

Species clarification of the prize medicinal Ganoderma
mushroom “Lingzhi” (2012)


Created: 2012-12-04 23:12:19 CET (+0100)
Last modified: 2017-06-25 04:45:53 CEST (+0200)
Viewed: 124 times, last viewed: 2018-01-31 00:00:19 CET (+0100)
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