Notes:
Cap diameter about 4 cm. Stipe length 6-7 cm.

Cap margin tuberculate-striate, striations deeply seated and occupying 35%-45% of radius.

Cap with dark brown umbo transitioning to a cream-colored margin. Colors in first photo are accurate.

Stipe with dense floccose material, easily brushed away. Stipe surface shredding in some areas.

Stipe buried to about the upper margin of the volva. Volva membranous, persistent, and somewhat rubbery.

Spores mainly globose, some subglobose. 9-12 × 9-12. (One seemingly large spore seen in the photo appears to actually be two spores stuck together.

Mowed path near fairly young oaks (~20 feet tall). White pine in the vicinity, also fairly young trees.

This is the best match for the specimen originally used to represent the provisionally named Amanita cyclops that I have found. Same exact location as the type specimen. I have observed a number of other fruit bodies in this same 4 square yard area that likely represent the same taxon. But, not many of them manage to remain in-situ until maturity, due to this material apparently being a favorite food for slugs. The recent spell of dry weather probably helped this critter (although some slug damage is apparent). This mushroom fruited during dry weather. Only <0.01 inch rainfall during the 3.5 days leading up to my finding it. Not more than 30 hours previous to this discovery, I had carefully checked the location and this mushroom was not present at that time. Other fruit bodies observed in this location over the past 3 years (possibly representing the same taxon) have featured unexpanded caps. In most of these cases, the umbo is prominent, but gray instead of brown (except for the type specimen). Spore dimensions for these other collections match this observation very well.

For additional details see http://www.amanitaceae.org/?Amanita+cyclops .

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Comments

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Love it, David.
By: R. E. Tulloss (ret)
2018-07-13 13:08:16 CDT (-0500)

I would like to see if we can repeat derivation of the DNA sequence for cyclops. :)

Very best,

Rod

Created: 2018-07-12 13:35:13 CDT (-0500)
Last modified: 2019-04-12 13:08:46 CDT (-0500)
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