Oak- dominated woods.

I believe these two specimens represent the same species. Growing several feet from one another.

Globose spores.


Proposed Names

29% (1)
Recognized by sight: Numerous lamellulae of diverse lengths.
Based on microscopic features: Globiose spores, diameters appear to conform to 10+-2 microns.

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= Observer’s choice
= Current consensus


Add Comment
By: R. E. Tulloss (ret)
2018-07-21 18:00:16 CDT (-0400)


By: Dave W (Dave W)
2018-07-21 16:35:08 CDT (-0400)

The taller one has a ratio (stipe length)/(cap width) much larger than what I have seen with cyclops. The shorter stouter one has a stipe/cap ratio more like what I’ve seen with cyclops.

I think there’s a bit of strained reasoning (extrapolation) here on my part… The short one does not have a cap colored like cyclops, but the stature is reminiscent of cyclops. The tall one has cap somewhat similar to cyclops. And, I suspect the two mushrooms seen here represent the same taxon. So, I guess I’m saying this all adds up to a low-confidence cyclops proposal. Given that we are still working to understand the morphological range of Amanita cyclops, and how environmental/habitat may influence morphology, I think that measured speculation is appropriate.

The short one seen here also has the tuberculate-striate cap margin (with deep-seated grooves) I have noted for cyclops.

Sure would be nice to find a bona fide example of A. cyclops in a location other than that three square yard patch on my property. I’m always looking!

Looking at a lot of cyclops photo, I get a strong impression of its short stature.
By: R. E. Tulloss (ret)
2018-07-21 14:02:42 CDT (-0400)

Even dried the mushroom here have retained a difference in stature consistent with the phots. Interestingly the tall, gray species dried with a very dark center of the cap. R

The differences in pigment distribution on the caps…
By: Dave W (Dave W)
2018-07-21 12:49:25 CDT (-0400)

seems like a good reason to treat these as separate collections.

Looking carefully at these two mushrooms, I see that I had misconstrued the separation “A” and “B”. I’ll not change the label on the thumbnail photo (sequence of names AB). Photos 2 and 3 are re-labeled as “BA2” BA3" to reflect the left-to-right order of the mushrooms seen in these photos. Photos 4 and 6 appear to each show the same specimen (B). This is verified by observing the indentation along the cap margin of B. Regretfully, I do not know if this affects the labels on the spore photos. But, the spore morphology looks pretty similar.

The voucher material for this observation has been accessioned in our herbarium.
By: R. E. Tulloss (ret)
2018-07-21 11:55:00 CDT (-0400)

I have split the collection as indicated in the notes with the herbarium accession nos.

Again, thanks for these challenging collections.

Very best,


I agree with the idea of two species in this collection.
By: R. E. Tulloss (ret)
2018-07-21 11:31:50 CDT (-0400)


At least, we can say…
By: R. E. Tulloss (ret)
2017-08-11 13:11:38 CDT (-0400)

that two apparently long-separated groups have evolved species in group A that have closely mimiced evolution of species in group B: evolving yellow pigment, evolving prominent and hard umbos, evolving deeply inserted stems, evolving graying and fragile volva (rhacopus-like), etc. It is quite interesting.

Very best,


The “cyclops” seen at obs 208335
By: Dave W (Dave W)
2017-08-07 02:44:12 CDT (-0400)

had volva with upper margin near the surface of the ground, a similarity to this present observation. This is different than the Penetratrices, which seem to always have volva completely buried at a depth of at least 2 cm. On the other hand, the thick umbo seen in this observation (presumably hard; I need to evaluate more material) mirrors the Penetratrices.

I see that ret has obtained molecular data that separates “cyclops” from the Penetratrices (see discussion at obs 208335).

I wonder about whether the Vaginatae, with their unusual diversity of species, may provide us with a snapshot of ongoing natural selection, a stage at which competing (groups of) organisms include both those that will ultimately emerge as winners as well as those that will ultimately be supplanted…?

Created: 2017-07-13 07:50:59 CDT (-0400)
Last modified: 2018-07-21 18:00:17 CDT (-0400)
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