Observation 13551: Armillaria (Fr.) Staude

When: 2008-11-04

Collection location: Southeast Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

I thought Tricholoma when I first found it. The veil looks pretty thin, and nearly like a cortina. Pretty pronounced dark brown scales on the cap. Associated with an ornamental birch tree at a local college.


Proposed Names

-9% (3)
Recognized by sight
34% (4)
Recognized by sight: Based on 2 things: Irene’s astute observation, and remembering there was a nearby clump of Armillaria fruiting nearby. It does have Armillaria coloration, and the scales are within range, the white spore print. It was the tiny size that threw me off. Thanks Irene!

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= Observer’s choice
= Current consensus


Add Comment
Try Hygrophorus
By: Douglas Smith (douglas)
2008-11-05 06:59:00 CST (-0600)

There are many Hygrophorus that have a veil when small, try there. Also with really little stuff like this, you aren’t going to be able to get an id that you’ll have any confidence in. You need more caps of various ages, and better quality.

Why not Armillaria?
By: Irene Andersson (irenea)
2008-11-05 04:53:51 CST (-0600)
White spore print
By: Daniel B. Wheeler (Tuberale)
2008-11-05 04:39:21 CST (-0600)

Definately Tricholoma. Keys out to T. zelleri in Aurora, which this is NOT as it is much too small. Also, it has no aroma except a vague glue-y smell. Aurora also mentions two other species with reddish-brown coloring: T. robustum (never heard of) or T. focale (which I’ve both heard of and seen, but which I don’t think this is). Which leaves us back at Tricholoma species.