Observation 84891: Cortinarius rotundisporus Cleland & Cheel

When: 2011-12-18

Collection location: El Corte De Madera Creek Open Space, San Mateo Co., California, USA [Click for map]

Who: Tom (LanLord)

No specimen available



Proposed Names

35% (9)
Recognized by sight: Color, stature and cap surface texture all seem consistent with Inocybe. I’m very curious if the color in the photo is accurate and if there’s any information on odor.
8% (6)
Recognized by sight
-17% (5)
Recognized by sight: photoshopped. see comment.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Danny Newman (myxomop)
2015-12-19 18:46:55 MST (-0700)

was maybe a poor choice of words. I did not mean to imply that a corrupt image was the work of a corrupt photographer. I’d really like to see this photographed again with some better camera settings, white balancing, etc. For the moment, the blue seems to be very exaggerated.

art vs science
By: Debbie Viess (amanitarita)
2015-12-19 09:03:14 MST (-0700)

… on the other hand, at least Tom has an actual photo here with his observation, as opposed to those truly data-less obsies that we have been seeing far too many of lately.

Inocybe geophylla var. lilacena can be a quite lovely and colorful fungus, but it does seem as tho the camera was set at the vivid setting. That makes very nice art, but not such a great representation of true colors.

But forgery? Really? Come on.

Perhaps we should all just step away from our computers and get out there and do some charitable acts for others? ‘Tis the season, just sayin’.

Vivid setting…
By: Michael W (Michael Wallace)
2015-12-18 20:08:21 MST (-0700)

….Tom mentioned in a previous comment that his camera is set to Vivid which is not so good for mushroom photography, it enhances colours to the point where they cannot be used as good data for macroscopic description.

Tom, you should set your camera to a Standard setting and strive to produce images that look as close to natural as possible.

Doesn’t sound like
By: Byrain
2015-12-18 16:26:12 MST (-0700)

something LanLord would do, assuming the colors are bad I’d more likely blame the color balance. Anyways, edited or not this certainly was a fungus….

No, they were that blue
By: Tom (LanLord)
2015-12-18 16:24:05 MST (-0700)

as I mentioned in my initial post, I do some post photowork to correct for white balance. I shoot with white balance set to auto, so in shadows most things aren’t exact. But these things are significantly blue.

I found another group of them on 12/16/15 that were nearly the same blue hue.

You’re welcome to have your own opinion. But these weren’t “enhanced” to make them this blue, this is how the were.

By: Danny Newman (myxomop)
2015-12-18 15:34:12 MST (-0700)

I believe that the image was edited after the fact to introduce blue artificially. There are blue areas in and among various pieces of debris, blue which at best could be said to be so colored as a result of colonization by the mushroom’s mycelium, but the color occurs in pieces which appear to be sufficiently disconnected and/or distant from the mushrooms themselves as to make that unlikely. The distribution of blue in the caps of the two outside fruiting bodies is also suspect, if somewhat inarticulably so. There is also significant oversaturation in the greens, which further suggests tampering with blue values for dramatic effect. I suggest bringing this image to the attention of a Photoshop expert for further confirmation, should anyone want any. I have saved a copy in case the OP takes it down.

These were all pretty small
By: Tom (LanLord)
2012-12-13 20:02:59 MST (-0700)

Caps were probably 3 to 4 cm, stems were probably less than a cm.

What I see
By: Elsa (pinknailsgirl)
2012-12-13 16:35:14 MST (-0700)

Well I didn’t saw it… but it isn’t C. because the color of the gills since cortinarius have similar gills colour as you can see in:


The stem and the structure of the body seems to me not so fragile as the Inocybe, the diameter of the stem must have more than 1 cm, doesn’t it? The gills are not so close as the Inocybe description, too.

By other hand, I see some mottled hues of pinkish in the stem base like Inocybe and unlike these C. rotundisporus is not a north american specie… so Tom must probably be right.

Probably not
By: Alan Rockefeller (Alan Rockefeller)
2012-12-13 15:03:02 MST (-0700)

with that gill color.

By: Elsa (pinknailsgirl)
2012-12-13 11:46:26 MST (-0700)

Could it be Cortinarius rotundisporus?

By: Linas Kudzma (baravykas)
2012-12-12 12:15:10 MST (-0700)

I have never seen such an Inocybe in Northeastern US.

I have been out searching for these in the same area
By: Tom (LanLord)
2012-12-11 18:29:45 MST (-0700)

but so far, I haven’t found them again this year.

I did find some in a regional park a few miles north of where these were found, but they weren’t as strongly coloured.

I will likely be out there again this saturday or sunday looking for these again. I hope to be able to make some positive updates to this soon.

Haven’t even been out hunting yet this year.
By: Tom (LanLord)
2012-10-26 19:08:36 MDT (-0600)

New job has me pretty busy, I’m hoping to get out tomorrow morning.
After our recent rains, I’m hoping something will be popping up.

By: Danny Newman (myxomop)
2012-10-26 15:16:44 MDT (-0600)

any luck finding more?

no need to preserve them at all, Tom…
By: Debbie Viess (amanitarita)
2011-12-20 09:27:14 MST (-0700)

if their color is not quite as spectacular as depicted here! they could well be just geophylla var. lilacina, which is common. this could just be an unusually colorful form. humans don’t all come in the exact same colors, either.

got a buddy nearby with a mushroom/food dryer? that’s the easiest way to preserve it for examination down the line…

preserving in honey is a sweet way to go, but not so great if your honey uses it for tea! ;) many Inocybes are quite toxic.

By: bengtal (bengtal)
2011-12-19 22:44:02 MST (-0700)

1. Thorough Dehydration is the first way that comes to mind. Of course, their shape and stature won’t be the same, but that blue should remain. Air drying is sometimes too slow to prevent rotting, and oven drying may work at low temps, but can also compromise their integrity in my experience.

2. You could suspend the mushrooms in a preserving fluid in some glass jar. Honey would do the trick, but that would also obscure the appearance of the beautiful mushroom within. I’ve also heard of pickling mushrooms. If you could manage to preserve one of these in a jar of clear preserving fluid of some kind, it would look stellar in your window sill !!

I have a food dehydrator that I have used to sap the moisture of several collections. It works really well, and keeps the fruitbody intact. I live really close to you ! let me know if you want to use it.

Will do,
By: Tom (LanLord)
2011-12-19 20:40:35 MST (-0700)

As I said earlier, I’ve seen these in this same area before so I’m confident I’ll see them again.

Once I save them, what do I do with them?
Not sure I want something that smells as indiscreet as these things laying around the house for very long.

I find that the vivid setting heightens the color quite a bit…
By: Debbie Viess (amanitarita)
2011-12-19 18:30:18 MST (-0700)

with that little bit of punch, these could easily be var. lilacina, IMO.

but Tom, if you do find another with real knock-your-eyes-out blue color, fer heavens sake, save some!

That colour is pretty accurate
By: Tom (LanLord)
2011-12-19 17:05:10 MST (-0700)

I generally will use Windows Photo Gallery to adjust colour on photos to get the white balance as close to natural as possible, these are pretty accurate, the camera is set to vivid so it does pickup colour fairly well.

I was pretty amazed at the amount of blue on them as well. I’ve seen these before in this area, certainly they were very numerous last year.

Wow! Is that color accurate?
By: Nathan Wilson (nathan)
2011-12-19 16:44:24 MST (-0700)

I agree that this is probably an Inocybe based on the spore color, the stature and the cap texture, but I’ve never one so blue. It certainly doesn’t fit my concept of Inocybe geophylla var. lilacina.

Created: 2011-12-18 18:46:28 MST (-0700)
Last modified: 2018-05-26 02:07:22 MDT (-0600)
Viewed: 493 times, last viewed: 2018-06-02 00:11:05 MDT (-0600)
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