Observation 18297: Cystoderma Fayod

When: 2008-09-15

Collection location: Columbia Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available


[admin – Sat Aug 14 01:59:34 +0000 2010]: Changed location name from ‘Columbia County, PA’ to ‘Columbia Co., Pennsylvania, USA’


Copyright © 2009 Dave in NE PA
Copyright © 2009 Dave in NE PA

Proposed Names

-20% (3)
Recognized by sight: Granular cap surface, ring on stalk, smooth upper stalk surface, white spore print.
Used references: Bessette/Bessette/Fischer
63% (3)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
By: Dave W (Dave W)
2009-02-15 15:25:57 CST (-0500)

Debbie, I can’t find any mushroom pics via the link you posted. I’ll google the species name.

These have unusually long stalks (around three inches) for C. amianthinum or C. granulosum. Also, the rings and sheaths are particularly nicely intact. I have changed my ID to and from each of the two species mentioned here. I don’t claim with great certainty that it’s really either of these. However, the account in Bessette/Bessette/Fischer of C. amianthinum matches mine, in these respects: “(cap) sometimes with a broad umbo; surface dry, granular to nearly smooth wheh young, becoming slightly wrinkled… (stalk) sheathed up to the ring… incomplete or sometimes well formed superior to median ring… (stalk) pale yellow to pale brown above the ring.” But the B/B/S account of gill color of C. granulosum matches my collection better (whitsh not becoming pale yellow orange).

I left the dried specimens with the NJMA last Fall.

the cap on your interesting Cystoderma doesn’t quite look like amianthinum either…
By: Debbie Viess (amanitarita)
2009-02-14 11:16:04 CST (-0500)

here’s an example from MO of what Doug’s talking about re: the amianthinum veil; my mushroom is prob. the variety rugosoreticulatum, with a heavily wrinkled cap.

Prob. not Cystoderma amianthinum
By: Douglas Smith (douglas)
2009-02-14 10:01:37 CST (-0500)

These don’t really look like C. amianthinum, the key feature (macroscopicly) of the Cystoderma is the veil. In C. amianthinum the veil is thin and fibrous and breaks up into a thin granular ring on the stipe. Here the veil is persistant and flaring. In the west this usually clearly mean C. fallax, in the east it is more confused. Smith and Singer in a 1945 monograph named a species with a flaring veil from the east, and I forget the name right now. From northern Europe there is also C. intermedium and C. tuomikoskii, you need to find the spore size to help with those.