Observation 140265: Amanita amerirubescens Tulloss nom. prov.

When: 2013-07-17

Collection location: Lubec, Maine, USA [Click for map]

Who: Terri Clements/Donna Fulton (pinonbistro)

No specimen available

On ground under balsam fir in mixed woods.

Proposed Names

53% (3)
Eye3 Eyes3
Recognized by sight: The cap looks too highly colored for A. rubescens var alba.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Rod
By: Erlon (Herbert Baker)
2013-07-19 15:35:24 PDT (-0700)

More than likely there is a pseudoalbino form, which is what I probably found. Rod, have you had a chance to look at the type collection for A. rubescens var. alba?


In the gene-based study of rubescent taxa,…
By: R. E. Tulloss (ret)
2013-07-19 09:51:18 PDT (-0700)

we found that one of best documented samples marked “rubescens var. alba” in my herbarium seems to be an “albino” “amerirubescens.” This was the only “rubescens var. alba”" I ever collected for which the bottom of the partial veil was covered with powdery yellow volval material.

On the other hand, most of the “var. alba” material I have studied has different spores than does “amerirubescens”; moreover, the genetics indicate that the taxa are separate as well.

Our project is far from finished. I have posted a brief summary about what we’re seeing related to “amerirubescens” on MO this morning [ http://mushroomobserver.org/140397 ]. This is just a taste of our experience. Every time we see new sequences in our email, we prepare ourselves for more surprises.

Very best,


var. alba
By: Erlon (Herbert Baker)
2013-07-19 03:14:12 PDT (-0700)

I have found white forms growing alongside darker ones.

I agree with Eric concerning the cap pigmentation.
By: R. E. Tulloss (ret)
2013-07-18 20:17:44 PDT (-0700)

Very best,


Created: 2013-07-17 13:03:14 PDT (-0700)
Last modified: 2013-08-19 19:20:57 PDT (-0700)
Viewed: 59 times, last viewed: 2017-06-16 05:06:16 PDT (-0700)
Show Log