Observation 91846: Pluteus petasatus (Fr.) Gillet
When: 2012-04-04
Herbarium specimen reported

Notes: Growing from decaying log in predominantly hardwood woods.

It was starting to get dark out when we found these. I used my flashlight to look around the log and when my light hit the area around where the mushrooms were, I witnessed a pink cloud of spores floating around the log….Very cool!

These smelled nice. I kept getting whiffs of a smell very similar to maple syrup. There was also a more faint smell of store bought mushrooms (Agaricus bisporus)

Photos taken with iPhone 4s.

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Comments

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I agree with Petasatus, but what caught my eye
By: Paul Sadowski (pabloski)
2012-04-05 19:49:32 EDT (-0400)

was your comment about the sporulation. A group of us came upon this mushroom on Staten Island, NY. The circumstances put the mushroom in back light and before our eyes we could see the steady, almost breathlike, spore emission. Extremely cool!

This one’s a challenge
By: Tatiana Bulyonkova (ressaure)
2012-04-05 13:26:51 EDT (-0400)

I wonder if eventually smell will turn out to be the only working way to distinguish between P. cervinus and P. petasatus in the field :)

I agree that the stocky shape, rather prominent fibrils in the pileus center and stipe base are more “petasatus-like”, and so is growth in large groups. Also, my impression is that specimens which look more or less like a textbook case of P. petasatus usually have silkier cap surface (even if there are scales). The fungi in the picture look rather silky to me, but the color… a bit too dark. But again, it’s just an impression.

The more I learn about this group the less I understand. I’ve been spending too much time recently looking at Pluteus cervinus – P. petasatus – P. pellitus specimens and the feeling I get is like when you’re assembling a 8000-piece jigsaw puzzle half of which is blue sky. Eventually you can tell 50 shades of light blue apart but that doesn’t really make things easier, haha :D

smell
By: Alfredo Justo (Fredo)
2012-04-05 11:33:57 EDT (-0400)

defining smells in mushrooms is often difficult as they tend to be complex but generally speaking P. cervinus has a smell like raw potatoes (similar to the smell of Amanita citrina). The intensity of the smell often depends on the stage of development, environmental conditions and of course the perception of the collector.

Fredo
By: Matt Sherman (Shermanii)
2012-04-05 11:10:10 EDT (-0400)

I did notice the difference in smell compared to P. cervinus I have found in the past.
To me, P. cervinus smells kinda like fresh earth or something.

very probably P. petasatus
By: Alfredo Justo (Fredo)
2012-04-05 10:59:28 EDT (-0400)

the colors of the pileus, the short stipe in relation to the pileus and the sweet smell are all more “petasatus like” than “cervinus like”.

with all the “satellite” species around P. cervinus and P. petasatus you really need microscopy (and in many cases molecular data) to get to the right species

Scope?
By: Matt Sherman (Shermanii)
2012-04-05 10:33:14 EDT (-0400)

Thinker,
I found this species last year as well, growing alone. If I can find the photos, I’ll post ’em.
Have you thrown this species under the scope before?

hey Matt
By: jimmiev
2012-04-05 08:31:47 EDT (-0400)

I found this species recently too, only one and I didn’t take a closer look at it
http://mushroomobserver.org/91390

Ja, I guess
By: Matt Sherman (Shermanii)
2012-04-05 00:36:45 EDT (-0400)

these are more “cervinus” like. I saw a young specimen, on the same log, that had yet to open up all the way and it’s cap color was dark brown.

Most of these were pretty white. Is it common for P. cervinus to fade to white upon reaching maturity?

Created: 2012-04-05 00:28:02 EDT (-0400)
Last modified: 2012-04-05 10:53:48 EDT (-0400)
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