found under pine. this attractive species is out and about throughout the East Bay right now.

[admin – Sat Aug 14 02:05:52 +0000 2010]: Changed location name from ‘Serpentine Prairie, Oakland hills, Alameda CO, CA’ to ‘Serpentine Prairie, Oakland hills, Oakland, California, USA’


nodulose spores 100x
encrusted cheilocystidia.
thick-walled caulocystidia.

Proposed Names

29% (1)
Recognized by sight: two-toned fibrous cap, brown spore print.
Based on chemical features: mild, pleasant odor
57% (1)
Recognized by sight: pale pruinose stipe, marginate bulb.
Used references: Doug Smith.
Based on microscopic features: nodulose spores, encrusted pleuro and cheilo cystidia and thick walled cystidia on lower half of stipe! Thanks for the leads, Doug!

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= Observer’s choice
= Current consensus


Add Comment
Some ideas…
By: Douglas Smith (douglas)
2009-02-23 11:41:34 CST (-0500)

Well, using the “Key to Inocybe of CA”, F. H. Nishida
(Mycotaxon vol. 34, no.1 p181), I see…

With the nodulous spores, and the murcronate cystidia,
this all goes nicely to section Inocybe. If there
is caulocystidia on bottom half (and no cortina at all
when young), you get I. mixtilis. This should have a
pruinose pallid stipe, and a marginate bulbose base.

Without caulocystidia on the bottom half (and a cortina
when young), you get I. longicystis, with the nodulose
spores. Although this one is supposed to have pinkish
to buff apex of stipe, and stipe pallid but darking in
age to concolorous with pileus.

It would be good to get info on pleurocystidia to confirm
any of this, did you look at that?

By: Douglas Smith (douglas)
2009-02-23 11:28:30 CST (-0500)

Did you check the presence of caulocystidia? Are they present in the bottom half of the stipe?

nope, not going there…
By: Debbie Viess (amanitarita)
2009-02-23 11:12:48 CST (-0500)

hoped that somebody could recognize the macro. it’s a handsome fungus, and pretty distinctive. but I saw no photos of it on any of the major CA sites.
this is a job for…someone who cares more than I to chase it down!

thanks for taking a stab at it Irene; it was medium sized (5.5 cm), but definitely not white as is listed for American I. fibrosa on Kuo’s website.

You’ll need more than a spore shot here
By: Dimitar Bojantchev (dimitar)
2009-02-23 11:09:17 CST (-0500)

We have more than 25 species of nodulose spored Inocybe in California.
You’ll need more than a spore shot to get anywhere. Extensive
photographs and measurements of: cheilocystidia, wall thickness and
shape; caulocystidia (+/- lower & upper stipe); +/- of pleurocystidia
are just the beginning. Try to estimate the number of nodules on the
spores, it is useful. Of course, for starters we need good size measurements for your spores.


How about Inocybe fibrosa?
By: Irene Andersson (irenea)
2009-02-23 10:52:09 CST (-0500)

and the size..?