Larger side – (7.8) 8.5 – 12.7 . More or less globose.


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For people who have attended COMA and NEMF forays in the past decade or so…
By: R. E. Tulloss (ret)
2014-06-23 08:21:32 CDT (-0400)

The temporary code “sp-N34” has turned out to be the same species as “sp-T01.” Hence, “sp-N34” has been abandoned.


Hello, Stephen.
By: R. E. Tulloss (ret)
2014-06-23 08:19:26 CDT (-0400)

This is a dark species of the “rhacopus group,” which I am studying at present along with other folks in eastern North America. The dark cap color suggests Amanitasp-T01.” I have seen a collection of that species from Indiana National Lakeshore in Porter County. I’d be very interested in looking at the material.

Currently, it seems that sp-T01 has a range extending from east Texas to Wisconsin in the northwest and Massachusetts in the northeast. The cap colors of the several species in the “rhacopus group” are variable; however, sp-T01 is often darker (more black or gray in the tint) than are the other species. Maybe another way of saying it (better?) is that when a cap is darker (more gray, more blackish) then the probability that the mushroom belongs to sp-T01 appears to be higher.

So far we have 45 collections from the rhacopus group sampled and are working a couple dozen more. Fifteen fit my current concept of rhacopus; fifteen fit my current concept of sp-T01; and 15 are scattered among a number of other morphologically similar species.

A few pages bearing relevant data on WAO are as follows:

The latter page may cover a mixture of at least three similar taxa that we’re sorting out.

There are probably several more taxa involved in this group in eastern North America in addition to the above list. We’re trying to sort this out morphologically and genetically.

Very best,