Observation 231450: Amanita amerifulva group (Site ID) (Amanita fulva group)

When: 2015-06-24

Collection location: Larksville, Pennsylvania, USA [Click for map]

Who: Phil Yeager (gunchky)

No specimen available

In Oak, Maple, Black Birch, White Birch, White Pine woods. Could form symbiosis with most of these trees due to its proximity with them.


Proposed Names

64% (4)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
I see what you mean, Phil.
By: Dave W (Dave W)
2016-02-17 19:16:12 CST (-0600)

The mushroom in this observation is more vividly colored than obs 228101 .

My own MO observations accompanied by “amerifulva group” proposal or “amerifulva” proposal show cap color arrangement ranging from reddish brown to tawny brown to brown, especially at the disk, but sometimes fading markedly toward the margin. But, some have caps uniformly brown.

A fairly consistent amerifulva trait seems to be brown staining on the volval sac. Interestingly, this observation (231450) does not show any brown volval stain. But I think this may be due to the mushroom being young.

My understanding of the “amerifulva” situation is that Rod has found reason to believe there may be more than one eastern NA species currently lumped into the amerifulva category. Hopefully, once this is sorted out, macro differences like “shade of brown” will correlate with acceptable species name(s). For the time being, I think “amerifulva group” is the best way to classify the brown-capped eastern NA grisettes.

Many thanks Rod
By: Phil Yeager (gunchky)
2016-02-17 16:36:22 CST (-0600)

Dave look at MO obs. 228101 which was taken four fays later at the some spot but a few feet away. Quite a contrast in colors. Perhaps due to fading.

It looks like this critter has no skirt on the stem.
By: R. E. Tulloss (ret)
2016-02-16 20:16:48 CST (-0600)

And the cap has a white rather than orange-yellow margin. So I think this would fall in section Vaginatae rather than Caesareae.

Very best,


Created: 2016-02-16 19:45:24 CST (-0600)
Last modified: 2016-02-17 22:31:53 CST (-0600)
Viewed: 87 times, last viewed: 2018-07-01 03:02:32 CDT (-0500)
Show Log