Observation 96654: Macowanites luteolus A.H. Sm. & Trappe

When: 2012-06-07

Collection location: Mission, British Columbia, Canada [Click for map]

Who: Psylosymon

Specimen available

This species was found growing from very hard packed soil under some cedar and hemlock trees in a park. this area surounds a lake .

The cap and stipe was a light yellowish color . the cap was rounded and very hard to the touch. unfortunatly the biggest specimens were half eaten by bugs. The cap is enclosed around the stipe where there looks to be some thick wavy white gills. its really hard to see in the pics. The stipe was very short and blunt. It has a nice mushroomy scent when cut in half.

I have never encountered this type of mushrooms before.
A person on the Shroomery suggested the genus .Seems like a pretty good guess. It looks close to Arcangeliella crassa I think .

Proposed Names

-5% (2)
Recognized by sight
-2% (2)
Recognized by sight: If peppery

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Absence of latex.
By: Daniel B. Wheeler (Tuberale)
2013-04-18 13:27:49 CDT (-0500)

As no mention has been made of specimen producing latex, Arcangiella ruled out. NATS Field Guide notes Arcangeliella usually has a dark reddish-brown peridium which sometimes produces a milky latex.

These specimens are not reddish-brown, and have not apparent latex. Nor is a mention of maple syrup aroma made when specimens are dried (another clue to Arcangeliella).

Compounding the confusion, both Arcangeliella and Macowanites are Basidiomycota and Russulaceae.

Peridium of Macowanites often cracks in age. Interior mature gleba is orange yellow. (These are not mature.) NATS Field Guide calls M. luteolus “odor and taste render it uninteresting to the palate.” My experience with it suggests a grapefruit Lifesaver aroma as mature, which I find quite attractive.

Macowanites luteolus is the most likely option.

i would say…
By: Psylosymon
2013-04-17 19:07:33 CDT (-0500)

You nailed it Darv!!! Thanks so much. Ive been wondering about this for a while.

Exudate when sliced?
By: Daniel B. Wheeler (Tuberale)
2012-06-08 15:48:25 CDT (-0500)

Any specific odors, like syrup?

I can confirm Arcangeliella. Need more information to confirm species. Elevation of park might help too.

Cedar is not generally a good mycorrhizal fungi host, especially Western Red cedar, which seems the likely species in your area. So probably host species more likely to be Tsuga heterophylla, providing elevation is low.

Arcangeliella are sequestrate fungi, where the gills have become so convoluted spores can no longer fall out. Thus they are dependent upon being eaten by bugs and animals for spore dispersal. I believe you have mostly immature specimens here. Mature specimens and close-ups of any munched specimens (mature) or freshly-sliced specimens would be helpful.

Created: 2012-06-07 23:14:01 CDT (-0500)
Last modified: 2013-04-18 13:28:22 CDT (-0500)
Viewed: 138 times, last viewed: 2017-06-13 02:20:07 CDT (-0500)
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