Collection location: Browns Camp, Tillamook State Forest, Tillamook Co., Oregon, USA [Click for map]
Project: OMS Mycoflora Project
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|I’d Call It That||3.0||10.68||2||(amanitarita,Alan Rockefeller)|
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|I’d Call It That||3.0||0.00||0|
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a sort of nice, streaky brown, but nothing like that way dark cap in the photo, and certainly none of that red staining that you show and a very different PV (membranous and well developed and ready to drop here, as opposed to that typical abbreviated lep veil in your photo).
so maybe, kinda brownish, sure, but this obsie is certainly subrutilescens.
please share a photo of that “black cap” for a western Leucoagaricus tho, if you have it.
please link to them!
The slightly floccose-shaggy stipe is better for Agaricus however.
Debbie, I see quite a few brown-capped Leucoagaricus in CA, including a largish and very common one under cypress.
for your insightful and measured first hand observations.
Danny Miller and I looked at this when I brought it and it was actually he who guessed the species name. We have A. subrutilescens almost every year at this OMS event; it’s common in the area. The next day people brought several collections of it and one was slightly older than these, so we could see how the caps change color with age, the brown fibrils taking less and less of the area. The stem is floccose in all stages. In my mind there is little doubt that it’s subrutilescens; it’s just that I haven’t seen it so young before.
As for Leucoagaricus, we have leucothites almost every year (this included), but no other species from what I remember.
which unnamed sp. of Leu. rubrotincti have these dark brown caps when young?
if you have actually seen some, then I believe you. Can you share photos here, even if they are unnamed as of yet? Who better than you?
as to a proposed (only) name of Agaricus “thiersii” … as only briefly described in CA Fu, this Agaricus doesn’t show a particularly “stocky” fb, and details of the cap are not obvious, other than the dark color.
It must’ve been one of the many Kerrigan Agaricus names in CA Fungi that were used as though they were already published, which of course they are not.
I look forward to the actual publication of Kerrigan’s Agaricus book, and the detailing of these new species, as well as the (hopefully) widespread use and acceptance of his new names. Until then … a bit premature, eh?
Yes, these are too young for a good ID, esp. only from a photo. If you have actually seen dark brown capped Leucoagaricus sp. in the west, then sure, this could be one of those, too. But I have never seen one, myself, nor can I find western examples elsewhere.
as i said it could be either.
most western species in Leucoagaricus sect. Rubrotincti have not been named yet.
Agaricus thiersii – is a coarser more truncate version of Agaricus subrutilescens – reference to it in the Dennis et al. California mushrooms book (under Ag. subrutilescens).
which western Leucoagaricus has a dark brown cap like this one? That seemed to be the deciding factor between those two possible genera.
Indeed, youth in this case is a disadvantage.
And what is “Agaricus thiersii?”
These fruitbodies are so young, it is hard to tell what they would have become later in life. It could be either an Agaricus species (A. thiersii perhaps), or a Leucoagaricus.
these mushrooms are barely developed!
all other features work for subrutilescens … dark brown cap, shaggy white hollow stem, slightly bulbous at base.
For a subrutilescens very similar to your example, see Doug Smith’s obsie here:
I know of no dark brown capped Leucoagaricus sp. here in the west. Do you?
Created: 2015-10-25 17:36:24 PDT (-0700)
Last modified: 2015-10-28 19:53:12 PDT (-0700)
Viewed: 154 times, last viewed: 2017-06-20 23:13:16 PDT (-0700)