Observation 170567: Phlebopus (R. Heim) Singer

Single dark brown fungi in shaded area, partially covered by fallen bark.(see cap markings). The soil was dry. Some yellow spots of pigmentation were displayed through the pileus cap. The stipe was large and short/thick. The colour of the stipe was a dark brown to black with one half having a shiny surface. The darkest colour tended to show a blue tinge. The base of the fungi showed roots attached. When the cap and stipe was bisected, there did not appear to be any bruising, except for a small area on the stipe. The inner area of the stipe showed an unusual thread or vein {for a better word?},(two), one of which separated from the stipe main body when it was cut. Part of this “vein” dropped down for a small section, but remained attached to the intact section of the vein. The area of the find is a semi dry Eucalyptus forest. I have found one specimen similar to this in the same local area bit it did not have this unusual vein or growth in the stipe inner area. The fungi was mature and in good condition. Only the single specimen was located in the area.
I have included an image of the site of the find.


Hi Folks, I seem to have managed to create some confusion about the texture anomalies in the inner section of this stipe. The area in reference is highlighted and may be insect tracks.
Section of gill formation . Reagent – water Mag 100x
Same slide Reagent Melzers added and Mag 40x in all three images.
Same slide Reagent Melzers added and Mag 40x in all three images.
Same slide Reagent Melzers added and Mag 40x in all three images.

Proposed Names

35% (4)
Used references: MO
-1% (6)
Recognized by sight
-18% (5)
Used references: Bessette. (2000) See discussion for complete citation.
72% (4)
Eye3 Eyes3
Used references: Roy Halling

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Roy Halling (royh)
2014-08-15 11:04:10 HST (-1000)

is OK, Ian. I can see the shape/outline of the spoes. KOH or diluted household ammonia work equally well; the ammonia is less harsh.

Roy, Reagent

The reagent was Melzers not KOH, although I presume the colour and end result would be similar , in this case. My error. Thanks for the comment. Slowly starting to go through and do some more micrographs in other obs.Chow kk

By: Roy Halling (royh)
2014-08-15 07:21:53 HST (-1000)

fit Phlebopus. Thanks for that, Ian.

Micrograph added to file images. Last image.

Micrograph x100 reagent water. White balance 5000k For comments please.

Dried Specimen

Roy, I will contact Tom May and see if he would like the specimen, and if so, to fwd one half to you. If I do not send it down to Fungimap, I will fwd the specimen on to you for you to view at your pleasure. Chow, kk.

OK, Deb,
By: Roy Halling (royh)
2014-07-23 14:09:30 HST (-1000)

judgement call on ‘fleshy’ I suppose. HDT used it for anything that wasn’t a crust, a polypore, or microasco.
Fungimap meets in April 2015, NSW. Check their website for details, updates.
Everything is a Boletus in the Friesian sense. Remind me to tell a story about John M. and Peck (offline of course). Thanks.

Ah, I see
By: Roy Halling (royh)
2014-07-23 14:02:40 HST (-1000)

specifically what you are referring to Ian. Looks like a reaction to cutting. Age, moisture, time since picking, texture of flesh reaction, weather in situ. I don’t think it’s a big issue in this Obs, Ian.

OK Roy, fair enough.
By: Debbie Viess (amanitarita)
2014-07-23 12:44:24 HST (-1000)

Those exotic, poroid, glow-in-the-dark mycenas are not boletes, but they aren’t particularly fleshy, either!

Wouldn’t that statement still be true in NA, though? And how would you describe, in a sentence, what a bolete is? Certainly this Phlebopus is a bolete as we recognize such, but certainly NOT a Boletus.

When is the next OZ expedition? I’d be glad to sign up, and pay my own way!

Stipe “veins” highlighted with edited text attached to image. (Last loaded in group of images.)

Please see new image with highlighted areas in mention.

Not any pored fleshy fungus is a bolete
By: Roy Halling (royh)
2014-07-23 11:47:21 HST (-1000)

Try Filoboletus, Poromycena. A working list of bolete genera can be found at: http://sweetgum.nybg.org/boletineae/taxonomy.php. Comments, suggestions, additions, and of course suggestions for improvement, are always appreciated.

Yes, Deb, lots to be done and workers are needed. I’m happy to share the load. Thanks for listening!

whoa what a cool bolete!
By: Debbie Viess (amanitarita)
2014-07-23 08:38:43 HST (-1000)

Any fleshy pored fungus is a bolete; Boletus is a specific genera, as is Tylopilus and Phlebopus (a new one on me!), Suillus, Xerocomus, etc., etc..

Are you referring to those insect tunnels in the bolete flesh as “veins?”

Sounds like we still have a lotta work to do in Oz. Where do I sign up? ;)

Thanks, Roy,
By: Daniel B. Wheeler (Tuberale)
2014-07-23 08:30:19 HST (-1000)

Any discussion over the “thread or vein” in the stipe? Maybe just the first reference to the interior stipe? Ever seen similar?

Another genus – - -
By: Roy Halling (royh)
2014-07-23 04:22:10 HST (-1000)

Ian and Daniel: Thanks for the detailed discussion. The images that Ian has posted here look macroscopically very much like a Phlebopus that I have seen on one or two occasions in Australia and SE Asia. Microscopically, clamp connections will be present and the spores will be ovoid in shape. Easy enough to check.

I’m not sure what the “vein” thing is you are describing, Ian.

The genus is widespread, but not common in Australia. A genus name used in earlier literature is Phaeogyroporus, and Phae. portentosus and Phle. portentosus are names you will find in some field guides.

In a study of Cooloola (and elsewhere in Australia) boletes, Watling and Gregory noted that the name_P. portentosus_ (Ceylon) is superseded by P. marginatus (Swan River, W.A.). They suggested a synonymy. P. marginatus is black and velvety (quite like the bolete in Ian’s images). I have seen this once in Denmark, W.A. at the 2011 Fungimap conference (July 2011). I have also seen it in Thailand (see below) and have a specimen.

To muddy the waters some, there is another Phlebopus often seen and reported in eastern Australia. I have seen this entity twice. It is HUGE and brown. On one, the pileus was 400 mm broad. Go here: http://sweetgum.nybg.org/boletineae/specimen.php?irn=946437 (200 mm from NSW) and here: http://sweetgum.nybg.org/boletineae/specimen.php?irn=946437 (the Thai specimen).

A discrepancy is that my notes indicate a pale yellow flesh and erratic bluing – not noted or seen in Ian’s images.

For now, my working hypothesis is: there are 2 species of Phlebopus in Australia (so far). One is black and corresponds to the original Swan River P. marginatus (black one); and the other is the brown one, which may be P. portentosus or is still undescribed.


Thank you again for your patience with me and as always a follow-up with detailed information. Please be assured that I read (& try to absorb) the information so well delivered. I think your second suggested ID is very close to the mark. The specimen (before drying) commenced to turn black and the yellow underpart of the pileus became de-saturated of its colour. After drying it turned completely Black . So, Tylopilus atronicotianus is my choice at the moment. If at anytime (as I have suggested to fellow MO members), you would like a specimen to examine I am only too pleased to oblige.
(what would we do without the remarkable sage). (A philosopher is a wise man distinguished for wisdom and sound judgement while a sage is a wise man distinguished for wisdom and from experience.)

“True knowledge exists in knowing that you know nothing.” – Socrates
By: Daniel B. Wheeler (Tuberale)
2014-07-20 04:14:21 HST (-1000)

Science uses a binomial naming system. All life on earth is divided into Kingdoms, Division, Subdivision, Class, Order, Family, Genus and Species names. Only recently have fungi been given their own Kingdom, the Fungi. How does this apply to Tylopilus alboater? The Kingdom is Fungi; the Division is Eumycota; the Subdivision is Basidiomycotina; the Class is Agaricomycetes; the Order is Boletales; the Family is Boletaceae; the Genus is Tylopilus (at least it is for this week); and the genus is alboater.

I said earlier that Tylopilus was a subdivision of boletus. I erred. (It won’t be the last time.) I should have said Tylopilus is a Genus of the Boletaceae family.

Your specimen is similar to Tylopilus alboaster, or the Black velvet bolete in Bessette AR, Bessette A, Roody WC. (2000). North American Boletes: A Color Guide to the Fleshy Pored Mushrooms. Syracuse, New York: Syracuse University Press. ISBN 0-8156-0588-9. But T. alboaster is not an exact match.

A little closer may be Tylopilus atronicotianus, or false black velvet bolete. This species has a bulbous stipe, flesh that turns first pinkish when sliced, then eventually blackish when dried; and has a bread-crust brown cap color. Your obs. has a darker brown cap than T. atronicotianus. But is similar. I have not collected it. (Did the cut flesh eventually turn black?)

So I will fall back on Socrates.


Now I am confused. Tylopilus V Boletaceae.

By: Daniel B. Wheeler (Tuberale)
2014-07-19 18:33:23 HST (-1000)

Tylopilus is a subdivision of Boletaceae. So if it is Tylopilus, it has to be Boletaceae.


Well Daniel we know it is not Boletaceae.

Never seen anything like it, Ian.
By: Daniel B. Wheeler (Tuberale)
2014-07-19 17:21:46 HST (-1000)

BTW, Tylopilus seems possible. But then again, I don’t know much of Australian fungi.


Daniel, Thanks for that. I am still trying to come to grips with “Tylopilus and Boletus”. I was never sure how to pick the difference. I will try to remember this and again thank you. The really thick stipe made me think it may be Boletus. What do you make of the feature in the cut stipe?.kk

Not roots, Ian.
By: Daniel B. Wheeler (Tuberale)
2014-07-19 17:01:21 HST (-1000)

Boletaceae develop from mycelium. The root-like structures are called rhizimes.

Created: 2014-07-18 21:13:36 HST (-1000)
Last modified: 2014-08-15 07:34:18 HST (-1000)
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