Observation 210820: Amanita xanthomitra Tulloss nom. prov.

This one seemed interesting. Cap color is as seen in photo, with olivaceous tint. Ornamentation on stipe is white.

Specimen preserved.

Stipe was broken at base.


Proposed Names

31% (2)
Recognized by sight
92% (2)
Recognized by sight
Based on chemical features: nrITS and nrLSU sequences of very good quality.

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= Observer’s choice
= Current consensus


Add Comment
By: I. G. Safonov (IGSafonov)
2017-12-24 14:22:19 PST (-0800)

It’s not so much about the choice you presented as it is about common sense and risk assessment. Seasoned collectors know how to keep their skin intact (more or less); it’s the general public that we are concerned about. That’s one of the reasons we have a legal disclamer on the club membership form. :-)

Does this mean we have to choose between a whole skin and a full basket?
By: R. E. Tulloss (ret)
2017-12-24 13:15:43 PST (-0800)


Thanks again, Rod
By: I. G. Safonov (IGSafonov)
2017-12-24 09:32:04 PST (-0800)

Sounds interesting and promising. I didn’t know NJMA used to go there — must have been well before my time… It seems that August and early September is the best time to see mushroom diversity in the barrens, provided the weather conditions cooperate, but we no longer hold public forays in the barrens during summertime due to the pesky insects.

The park doesn’t require a permit last time I checked.
By: R. E. Tulloss (ret)
2017-12-24 08:59:25 PST (-0800)

NJMA used to go there. There is considerable diversity of habitat, but it’s all familiar from other Pine Barrens sites. At the right time, the parking area is adjacent to an original pine-filled strip that is loaded with amanitas and boletes. The picnic areas are trodden down, but they are immediately adjacent to area where people rarely walk that produce prolifically if the time and weather are right. I have found many interesting Vaginatae there (for some apparent species, only once, of course).

Very best,


Thanks, Rod
By: I. G. Safonov (IGSafonov)
2017-12-24 07:55:23 PST (-0800)

I heard of the park, but have never been there. I think I found the location your pointed out from the satellite imagery on Google maps. Looks like I will need to take a DEET or permethrin bath before coming there. :-)
Perhaps NJMA should give this park a try this coming year. We’ve been exploring new foray locations in the state after having gotten tired of some of our old haunts.

I suggest Shark River County Park in Monmouth County. There is trail that goes…
By: R. E. Tulloss (ret)
2017-12-24 07:27:38 PST (-0800)

… up hill around what I think is the western end of the pond. I have collection there that was from an island of brush and pines in the middle of walkable areas on that slope.


Interesting, Rod
By: I. G. Safonov (IGSafonov)
2017-12-23 20:16:03 PST (-0800)

I am yet to find this taxon in the NJ Pine Barrens. Perhaps it’s locally common in some parts of the state, not in the areas which I visit most often. It’s possible the Burghardts and I have come across it at FPP, but the gestalt doesn’t ring any bells.

I find this species in the NJ pine-oak barrens.
By: R. E. Tulloss (ret)
2017-12-23 19:29:13 PST (-0800)

I’m pretty sure that the species’ range extends into SE Canada.

Very best,


Nice work, Rod!
By: Dave W (Dave W)
2017-12-23 15:38:36 PST (-0800)

I wish I would have recorded more details about the habitat. The mushroom was found during a Wyoming Valley Mushroom Club foray, so at the time I was likely busy trying to answer people’s questions. The location is a piece of private property (not far from Lackawanna State Forest, Thornhurst PA). Much of this private property featured fairly young mixed hardwood forest, lots of oak with some birch and maple mixed in. There was one small wet area of hemlock/birch. I’m not sure, but I think this mushroom came from the hardwood area.

The olivaceous tint of the cap and the warts becoming essentially black over the disc…
By: R. E. Tulloss (ret)
2017-12-23 09:44:05 PST (-0800)

…and with age and the beautiful nrITS and nrLSU say this is Amanita xanthomitra. Very nice photos!

Very best,


Created: 2015-07-20 17:37:55 PDT (-0700)
Last modified: 2018-02-27 12:35:15 PST (-0800)
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