When: 2015-08-05

Collection location: Sarasota, Florida, USA [Click for map]

Who: Mary Smiley (ladyflyfsh)

No specimen available

Growing on the ground in wood chips. Pale yellow like Leucocoprinus birnbaumii, but with brown scales from top of cap throughout cap. Brown scales even on the smallest button. I’ve seen thousands of L. birnbaumii, but never with brown scales like this. So, what do you think it is?

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Proposed Names

50% (2)
Recognized by sight
22% (3)
Recognized by sight: Brown cap center, not bright yellow

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nice documentation of an unusual morph.
By: Debbie Viess (amanitarita)
2016-06-23 08:36:20 PDT (-0700)

although we can’t see the majority of those stem bases, the one that you do expose has a contrasting “chrome yellow” base, so maybe it is “tricolor.” I guess the next question is … are these merely color morphs of birmbaumii? Even some of the birnbaumii on Kuo’s webpage have what appear to be “chrome yellow” bases!

Spore size could separate some of these out, as could DNA. Maybe Alan would be willing to run this one, too! Long list and getting longer …

Try and collect some next time Mary. Cool shroom.

By: Danny Newman (myxomop)
2016-06-23 08:29:54 PDT (-0700)

does x{NAME else }{ User else }x say?

The very dark scales
By: Jacob Kalichman (Pulk)
2015-08-06 09:18:20 PDT (-0700)

certainly are striking!

On one hand, my species concept of L. birnbaumii is just “yellow Leucocoprinus that isn’t too delicate”.

On the other hand, of course, this may be too broad.

On the one hand again, I don’t recall ever seeing any mushrooms identified to the contrary.

On the other hand again, I haven’t actively searched for such an exception.

On the one hand again, regardless of whether or not that’s accurate, it is a widely adopted and useful name (it would mean “Leucocoprinus birnbaumii group”, I suppose…)

I don’t think they fall too particularly far outside the normal range of L. birnbaumii though, at obs 172813 are some I found with related (but much much more muted…) scales… You also have to factor in that mushrooms, along with everything else, are always a little weird in Florida.

About your comment about the scales being there even young, such is the way of Agaricaceae. Fruiting bodies start out covered in the scale material and it gets spread out into scales as the cap expands. So that’s to be expected.

the dark scales
By: Mary Smiley (ladyflyfsh)
2015-08-06 05:01:54 PDT (-0700)

make these specimens different from any I’ve seen. I have seen thousands of L. birnbaumii because they grow prolifically in my back yard in the summer, but I have never seen them like this with the dark brown scales and brown top of cap. These look different to me, which is the only reason I posted this here. Even the tiniest specimen in one of the photos already at its tiny stage, has the brown specks on it. Are we sure there isn’t another species differentiation of this compared to the all yellow version which is what I am used to seeing?