Please do not re-click a link while waiting for a page to load. (It’s slower and degrades site speed for all users.)
To get images for machine learning, see MO Images for Machine Learning


Birch, beech, maple, hemlock.


Proposed Names

58% (1)
Recognized by sight: Gray annulus.

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

= Observer’s choice
= Current consensus


Add Comment
You’re welcome, Naomi.
By: Dave W (Dave W)
2013-10-27 03:05:06 CDT (-0500)

I had hoped to send additional examples of this type. But during the latter part of the season the weather became so dry here. This was the only example of a porphyria type I found the entire year. Usually it’s fairly common, especially at this Loyalsock Trail location during Septmeber/October.

Thanks Dave,
By: groundhog
2013-10-25 13:30:42 CDT (-0500)

This material has been recieved and accessioned into Rod’s herbarium. We have also scheduled it for DNA sequencing.

The description is very interesting to me.
By: R. E. Tulloss (ret)
2013-09-09 09:54:16 CDT (-0500)

Material with appearance that you provide has been called sp-N17 by me. This material was from Vermont and Maine; and is now old enough so that there were some problems extracting DNA, when that was attempted a few months back. I would really like to try sequencing again when Dr. Hughes’ work load lets up a little—she has 250 students this semester.

The sequences that we have for porphyria so far show that it’s cap pigmentation can vary. We have a completely white specimen, virgate yellow-brown specimens from Newfoundland and “typically” pigmented specimens from all around the the Northern Hemisphere with a variety of host plants. Maybe if we looked a more loci, we’d find more genetic differences; however, that is not happening yet. I’d very much like to try sequencing on more than one collection from your area and to test the idea that older collection of the species look like my “sp-N17.” That would improve my understanding.

Thanks for the post and the additional info.

Very best,


Hi Rod.
By: Dave W (Dave W)
2013-09-09 07:06:46 CDT (-0500)

I snapped a few straight-on top-down photos, but the quality is not so good. I’ll describe the appearance of the cap. Shiny dark grayish-brassy with pseudo-striations on part of the margin. The one posted photo shows the innate fibrils, concentrated more toward the disc.

I believe this appearance (not altogether what one expects for A. prophyria) is due to the very dry weather that has predominated for the past 10 days or so. The mushroom appears to have fruited at least a week prior to its being collected. The collection was made in an area where A. porphyria seems to be quite common during this time of year. I have preserved the material.

Hello, David.
By: R. E. Tulloss (ret)
2013-09-08 22:23:32 CDT (-0500)

Do you have a straight on view of the cap from the top?

Very best,