Observation 186664: Amanita rhacopus group
When: 2014-09-15
No herbarium specimen

Proposed Names

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I should add …
By: R. E. Tulloss (ret)
2014-10-30 13:27:52 CDT (-0500)

that in deciding which species to compare with “rhacopus,” I eliminated all of those that have a volva that is other than white before the graying or other color change occurs.

Very best,


Beautiful, but probably not “rhacopus,” Walt.
By: R. E. Tulloss (ret)
2014-10-30 13:24:33 CDT (-0500)

Just in the last day, I posted another species on WA) in the “rhacopus” group.

The new taxon is here:


Another member of the “group” with a cap color somewhat similar to that in your photo is here:


To illustrate that some of these taxa can be separated from some of the others by spore data alone, I set up (on the technical tab of the “rhacopus” page) sporographs comparing the spores of “rhacopus” with a group of the other taxa that are separated morphologically and/or molecularly from “rhacopus,” as of this morning.

The sporographs “stream” data from the database that underlies the web pages. Hence, if I change spore data for some species, all the sporographs on the site that include a graph representing that spore data are immediately updated to reflect the change. Nice feature thanks to David Tulloss.

The “rhacopus page” is here:


Since the data sample sizes are all pretty small at the moment, there will be some changes in the graphs before they stabilize.

Very best,


Created: 2014-10-30 12:18:50 CDT (-0500)
Last modified: 2014-10-30 15:48:28 CDT (-0500)
Viewed: 21 times, last viewed: 2017-02-04 01:36:34 CST (-0600)
Show Log