Observation 153548: Hebeloma (Fr.) P. Kumm.

Growing in a spruce habitat.
Caps up to 8.6 cm across.
Spores ~ 10.9-11.9 X 6.2-7.2 microns and moderately rough. Q(ave) = 1.62.
KOH on cap was brownish.
KOH on cap and stem flesh was orangy-yellow.
They may be a little too old for a good ID.
Could not find any cystidia on the gills?
Spores are a little larger and rougher than the Hebelomas that I’ve checked so far.


Proposed Names

29% (1)
Recognized by sight
57% (1)
Recognized by sight
47% (2)
Recognized by sight: whitish bloom on cap, ragged gill edges, size and shape of spores
Used references: Kuo, M. (2012, March). Hebeloma sinapizans sensu A. H. Smith. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/hebeloma_sinapizans.html and Mykoweb

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= Observer’s choice
= Current consensus


Add Comment
On a macro level
By: Dimitar Bojantchev (dimitar)
2013-11-29 21:47:02 CST (-0500)

On a macro level there are two things that speak Hebeloma:

1) Complete lack of any hanging Cortina on the stipe.
2) Certain furfuraceous ornaments at the top of the stipe

The spores are typical Hebeloma.

I would not rush to put a species name — we have a lot of undescribed material. I do not see H. sinapizans here, I think this material is around the concept of Hebeloma birrus

Here is a similar one that I collect from time to time.


Those are good questions Terri.
By: Ron Pastorino (Ronpast)
2013-11-29 21:27:59 CST (-0500)

When looking for cystidia, I always use Congo Red to stain the sample so that I can see(and photograph) whatever I find.
I’m not sure if the age of the F/B is super important, but I suspect ideally a “middle-aged” or slightly more mature specimen is best.
The presence of cheilocystidia in Hebelomas is one of the distinguishing characteristics that separate them from Cortinarius, although I believe there are a few Corts with cheilocystidia.
The cheilocystidia that Kuo shows looks rather puny and what I saw was equally small, almost like immature basidia. If I had the patience, I would go back and more carefully recheck. However, I trust Dimitar’s judgement and really don’t like Hebelomas (-:!

Seemed like a reasonable proposal
By: Terri Clements/Donna Fulton (pinonbistro)
2013-11-29 19:14:32 CST (-0500)

given macro features and habitat. Not sure about micro. Any chance that the age of the FB’s and/or the fact that the cheilocystidia are hyaline could make it difficult to ID/see them? (If this is a silly question please forgive me as I am trying to learn by keying out obs and proposing names). Also, I see no mention of cheilocystidia in the Mykoweb description for whatever reason but it does say that the gills can appear marginate in older specimens which seems like the case here?

OK Terri, based on the Kuo reference
By: Ron Pastorino (Ronpast)
2013-11-29 18:20:20 CST (-0500)

Hebeloma sinapizans group seems a reasonable ID at this point.
Although I didn’t really think I was seeing Cheilocystidia when I quickly checked, I did see something similar to what Kuo’s photo shows, but not a lot and what I was thinking could be basidioles.

By: Dimitar Bojantchev (dimitar)
2013-11-29 12:19:53 CST (-0500)

We all get fooled often. It is important that your observations are quality enough to help in the correction.

Ouch, when am I going to stop
By: Ron Pastorino (Ronpast)
2013-11-29 10:31:42 CST (-0500)

being fooled by these sneaky devils?!?

By: Dimitar Bojantchev (dimitar)
2013-11-29 00:48:12 CST (-0500)

My dear Ron,

this is Hebeloma — thank you for the great photos.


Created: 2013-11-23 21:09:31 CST (-0500)
Last modified: 2013-11-29 22:42:43 CST (-0500)
Viewed: 96 times, last viewed: 2019-01-19 19:13:58 CST (-0500)
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