When: 2008-01-29

Collection location: Los Angeles Co., California, USA [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

Specimen available

This mushroom has a pungent aroma, sort of like radish. Spores are roughened.

Under oak.

From this thread.


pleurocystidia 400x
pleurocystidia 400x
pleurocystidia 400x
cheilocystidia 400x
basidium 400x
pileipellis 100x
pileipellis 400x
New collection 2/22
New collection 2/22
New collection 2/22

Proposed Names

-14% (7)
Recognized by sight
Based on microscopic features
Based on chemical features
26% (5)
Recognized by sight: Inocybe is known to have some species with blue hues. Hebeloma is not known to have any species with blue.
Based on microscopic features: Thick walled metuloid cystidia with crystals at the tip suggests Inocybe.
62% (5)
Based on microscopic features: Cystidia
Based on chemical features: Sharp radish and matsutake like odor

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
different, see obs 12864
By: Irene Andersson (irenea)
2009-02-28 05:48:16 PST (-0800)

I agree, Alan – these don’t look quite like the european ones.

Inocybe aff. corydalina. Should be described as a new potentially hallucinogenic species of Inocybe.
By: P. Brandon Matheny (inocybe)
2009-02-09 13:17:33 PST (-0800)

This species is closely related to Inocybe corydalina from Europe, but material collected by Kevin Bock in the Santa Monica Mountains on 28-Jan-2008 under Quercus is only 91% similar to European corydalina when comparing their ITS sequences. Off the top of my head, I can’t think of any greening or blue-greening species of Inocybe described from North America with metuloid cystidia and smooth spores.

Regards, Brandon Matheny
University of Tennessee

Odor seems wrong, but…
By: Nathan Wilson (nathan)
2008-04-24 20:16:04 PDT (-0700)

I’ve found I. corydalina several times in southern California and it’s always had the characteristic matsutake-like odor (sweet and a bit spicy). I wouldn’t ever describe it as radish-like at this point, but I also don’t think of radish as being exactly ‘pungent’ and odors as used by mycologists are really one of those things you have to learn from someone else who knows them.

By: Kevron (Subbedhunter)
2008-04-24 10:03:28 PDT (-0700)

Im glad we finally buried this mystery. Thank you alan most of all fro helping me with ID’ing this species. Im suprised its actually a psilocybe containing inocybe.

Ill find new ones soon enough.
By: Kevron (Subbedhunter)
2008-04-08 18:49:02 PDT (-0700)

I shall go back soon after the next rain and look for more of them. I hope there will be more. Also, a follow up on this species will be done shortly. It is being analyzed again. Thank you for all the work alan. I finally made myself a mushroomobserver acct.

not a Pholiota
By: Debbie Viess (amanitarita)
2008-02-21 07:14:35 PST (-0800)

I sent these images on to Coleman McClenaghan, our US pholiota expert. Here’e what she had to say…

Hi Debbie,
About that mushroom. With the information given I don’t think Pholiota….spores are wrong. I don’t know about the other characters, not enough to go on. Pholiota subcaerulea; is a Smith and Hesler species, studied from four collections. I always get a little wary about Smith and Hesler species based on so few collections. Maybe the color of the pileus fits but in S&H’s type description they don’t mention roughened spores and they do mention pleurocystidia with highly refractive hyaline amorphous bodies. That fits the definition of a chrysocystidium. The cystidia shown on the mushroom observer did not seem to fit that description.


I don’t know…
By: Douglas Smith (douglas)
2008-02-15 16:33:38 PST (-0800)

The guy sure looks more like a Hebeloma, and I would go on what is “known”, Hebeloma has never been studied well, lots more has been done on Inocybe. But one clear thing perhaps, is that for Hebeloma the cap surface should be hyphae in a layer of gelatin, and Inocybe should not. Remember to not use KOH when looking for this, since the gelatin will desolve.

The spores you have there sure look like Hebeloma. Also Hebeloma should have lots of cheilocystidia, and no pleurocystidia, for most Inocybe (I think???) there should be thick walled pleurocystidia, but for some class of Inocybe there are not.

By: Erin Page Blanchard (CureCat)
2008-02-13 00:27:25 PST (-0800)

HAHAHAHAA!! I can’t believe you posted those prints, hehehe, so funny.

My guess:

Hebeloma sp.
(but you already know that)