Observation 8764: Agaricales sensu lato

Dried specimen obtainable with permission
from el Herbario Nacional de Bolivia

Scoped at the Amanitaceae Workshop at the Eagle Hill Institute, 8-25-2014

Acrophysalides absent in stipe tissue. Basidia long and thick-walled.

Spores subglobose to broadly ellipsoid with prominent apiculus. Inamyloid.

6-8×4.5-6.25μm (x=6.8×5.3μm, Q=1.2-1.52μm, Qm=1.279μm, m=20, s=1)

7 × 5 ; 1.4
7 × 5.5 ; 1.27
6.5 × 5 ; 1.3
7.5 × 5.5 ; 1.36
8 × 5.25 ; 1.52
7.5 × 5.25 ; 1.43
6.5 × 5 ; 1.3
7.5 × 5.5 ; 1.36
7.5 × 6 ; 1.25
6 × 4.5 ; 1.33
6 × 4.5 ; 1.33
8 × 5.75 ; 1.39
7.5 × 6.25 ; 1.2
7.25 × 5.25 ; 1.38
6.75 × 5.25 ; 1.29
7.25 × 5 ; 1.45
8 × 6 ; 1.33
7.5 × 5.5 ; 1.36
7 × 5.25 ; 1.33

Species Lists


Copyright © 2008 Larry Evans
Sporograph measuring from 5th to 95th percentile.
Courtesy of RET and Amanitaceae.org

Proposed Names

-35% (2)
Recognized by sight: Mycorhizal (see picture 4), veil remnants, bulbous cap on younger specimens (see picture 3), free gills, annular ring.
-6% (2)
Recognized by sight
58% (1)
Used references: Dr. Rod Tulloss
Based on microscopic features
-68% (2)
Recognized by sight
29% (1)
Recognized by sight
29% (1)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
By: Danny Newman (myxomop)
2016-01-29 13:46:32 CST (-0500)

I don’t think anyone’s taken your comments to be antagonistic. As for something in Tricholomataceae, if not Tricholoma specifically, I think that’s a possibility given the combination of features.

Sorry if i sound a little bit like a jerk sometimes,i don’t mean it.
By: Davide Puddu (Davide Puddu)
2016-01-29 12:01:28 CST (-0500)

i want to add just one thing…Armillaria are in Tricholomataceae. You were searching in Amanitaceae that are not omogeneous fungi.Tricholomataceae have adnate gills or with a decurrence by a tooth. They don’t have free gills like i think i see here.Are the spore cyanophile?

By: Davide Puddu (Davide Puddu)
2016-01-29 11:39:58 CST (-0500)

thank you ,i didn’t read carefully.

The absence of acrohysalidic stipe tissue means the species
By: R. E. Tulloss (ret)
2016-01-29 11:31:53 CST (-0500)

is not in the Amanitaceae…so it is neither Amanita nor Limacella.

Very best,


It was determined
By: Danny Newman (myxomop)
2016-01-29 11:08:50 CST (-0500)

at the Amanitaceae course lead by Rod Tulloss that this is not in Amanitaceae.

it reminds me of some Limacella
By: Davide Puddu (Davide Puddu)
2016-01-29 10:33:42 CST (-0500)

like L.guttata. Was the smell like flour? did you check the edge of the gills with the microscope?

By: Danny Newman (myxomop)
2016-01-28 17:38:40 CST (-0500)
in lieu of my upcoming ob.
By: Danny Newman (myxomop)
2013-07-25 04:34:39 CDT (-0400)

here’s the same species photographed last year in the same locale:

my thoughts exactly
By: Danny Newman (myxomop)
2012-01-22 12:46:46 CST (-0500)

by ‘makeover’ i mean an additional observation, not a replacement or modification to this one.

I suggest that you not alter this observation, but …
By: R. E. Tulloss (ret)
2012-01-21 22:04:39 CST (-0500)

create one linked to this one.


By: Danny Newman (myxomop)
2012-01-21 19:30:40 CST (-0500)

This observation is about to get a makeover in the form of a new observation (of the same population) in the next day or so. In the meantime, it has recently come to my attention that a researcher at the herbarium ate this with no ill effects. What could have possibly compelled this person to eat an unidentified mushroom, much less a suspected Amanita, is a story I intend to have the consumer herself recount in the coming days. That said, she is alive and well, to whatever extent that is taxonomically important.

Schinus molle
By: Christian (Christian Schwarz)
2009-10-25 09:59:23 CST (-0500)

First of all, the spelling is with a “u” not a "y’.

Second, Schinus molle is in the Anacardiaceae (poison oak, cashews, lots of other stuff), which I think does form ectomycorrhizae.

This tree is very common and in invasive in Southern California.

Thank you.
By: R. E. Tulloss (ret)
2008-08-08 20:14:52 CDT (-0400)

Thanks very much.


By: Danny Newman (myxomop)
2008-08-08 15:04:22 CDT (-0400)

Collected by: Larry Evans (& Danny Newman)
Date: March 6th, 2008
Specimen Location: Herbario Nacional de Bolivia – La Paz, Bolivia
Specimen Found: Herbarium Lawn
Growing in vicinity of Schinys molle

I think an entire fruiting body was shelved, so this should stand out in their collection. It was the size of a baby’s head. Not sure about any identification numbers. I’m pretty sure this info would be enough to find it with, but please post here again if you run into any problems.

Good Luck

continuing re the herbarium
By: R. E. Tulloss (ret)
2008-08-08 14:22:09 CDT (-0400)

In the documentation with the specimen is there a collection number, a date, etc.?
It could be referenced by your name, the name of the Herbario Nacional, the date, and any unique character string that would nail it down. Is a size measurment given in the notes?

Very best,


Herbarium Help
By: Danny Newman (myxomop)
2008-08-08 12:34:44 CDT (-0400)

Fortunate that you’ve chosen to inquire about this mushroom in particular, since it was collected on the grounds of the herbarium and should be easy to locate in their stacks. I reccommend writing Rosa Isela . Rosa worked directly and extensively with us at the herbarium and already has an archive of most, if not all of these photos (organized in an identical file tree as mine). You might mention Larry Evans of the Western Montana Mycological Association as well.

For the moment, the herbarium is a little less than thorough when it comes to their mycological collections, so although I’ve indicated that there is an herbarium specimen for about 75% of the observations I’ve posted, finding one could be anything from doable to fruitless. As of early this year, our specimens constituted the bulk of the herbarium’s collection, save for some work done by Roy Halling of the NYBG in the early 90’s. The herbarium’s organizational and referencing system should improve over time with the standardization (or just plain existence) of detailed field notes, and especially once photographs start to be filed with tissue samples. The size, location and reputation of this one, however, should make it considerably easier to find.

Identifier for this collection…
By: R. E. Tulloss (ret)
2008-08-08 06:50:45 CDT (-0400)

If I wanted to borrow this from Bolivia how would I identify the collection and to whom should I write?

Is Schinys molle known to form mycorrhizae?

There is something a little odd about the cap texture with regard to an Amanita. Also, there is something in the side view that suggests an Armillaria. There are a couple of armillarioid amanitas. Is there the possibility of someone locally checking the stipe tissue and gill trama to see if the species meets the definition of Amanita? If necessary, I can provide information to support such a person.