Observation 128337: Ganoderma P. Karst.

When: 2013-02-11

Collection location: San Pablo, Philippines [Click for map]

Who: Jon Shaffer (watchcat)

Specimen available

Proposed Names

59% (6)
Recognized by sight
-60% (2)
Used references: Mushroom Observer
-20% (3)
Recognized by sight
-15% (2)
Used references: Irenea and Herr Koller

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Danny Newman (myxomop)
2013-03-18 18:09:26 CDT (-0400)

applied to the context tissue or exterior?

is this your cleaner?
By: Danny Newman (myxomop)
2013-02-18 18:33:08 CST (-0500)


if so, I don’t know if some unknown amount of “Quaternary Ammonium Chlorides” is going to give us the desired effect. is basic household ammonia not available near you?

that aside, the cross section shows a brown context through and through. if my feeble interpretations of Heterobasidion and Ganoderma are correct, it’s definitely not the former, and probably the latter.

By: Danny Newman (myxomop)
2013-02-16 20:48:45 CST (-0500)

the reagent would need to be applied to the context, as in the inner flesh of the pileus. not sure if you’re lotion will be sufficient, though I kind of doubt it. household ammonia may be a viable alternative…

be sure to note the color of the context as well.

Specimen is here….
By: Jon Shaffer (watchcat)
2013-02-16 20:09:57 CST (-0500)

Don’t have KOH solution but just tried some Vaseline lotion which contains potasium hydroxide in the list of ingredients. Not sure of concentration. No change or color change on brown top, slightly chalky or white color on the light colored underside.

By: Gerhard Koller (Gerhard)
2013-02-16 19:05:41 CST (-0500)

I can only quote Ryvarden & Gilbertson in “European Polypores I” from 1993:

Basidiocarps perennial, resupinate to pileate, widely effused and tough; pilear surface at first light brown and finely tomentose, soon darker and smooth with a distinct thin black cuticle; pore surface light cream, pores regular, round to angular, mostly small, glancing; context white to light cream, dark reddish brown with Melzer’s reagent; hyphal system dimitic; generative hyphae delicately thin-walled, simple septate, clamps occurring in culture; skeletal hyphae dominating in the basidiocarp, dextrinoid, unbranched or with a few branches; cystidia none; basidiospores broadly ellipsoid to globose, hyaline, thin to slightly thick-walled, finely asperulate, negative in Melzer’s reagent; causing a white rot and butt rot of living conifers. On living and dead trees, predominantly conifers; temperate to boreal genus …
The dextrinoid skeletal hyphae, the simple septate generative hyphae, the cuticle on the pileus, and the asperulate spores make … a distinct genus.

More recent (I suppose you know this):


I for myself just know the three European species and have no idea about the extra-European ones besides photos and descriptions.

some ?s
By: Danny Newman (myxomop)
2013-02-16 18:19:25 CST (-0500)


do you still have this? if not, can you return to the collection location? it would appear that the absence of a KOH reaction in the context is diagnostic for Heterobasidion/against Ganoderma. I believe the overall un-KOH-ed color of the contexts of the two genera are completely different as well (whitish for Heterobasidion and brown for Ganoderma).

irenea & Gerhardt:

I can’t find much info on the unifying microfeatures of Heterobasidion. does its inclusion in the Bondarzewiaceae make all members’ spores warted and amyloid?

By: Jon Shaffer (watchcat)
2013-02-12 07:29:11 CST (-0500)

Thank you very much Irenea and Mr. Koller

If this is Heterobasidion
By: Gerhard Koller (Gerhard)
2013-02-12 05:31:25 CST (-0500)

then it most probably is Heterobasidion insulare.

Created: 2013-02-11 04:30:21 CST (-0500)
Last modified: 2013-03-23 20:53:07 CDT (-0400)
Viewed: 148 times, last viewed: 2017-06-15 10:41:07 CDT (-0400)
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