Notes:
55mm wide cap, 110 × 5.5-9.6mm stem. Growing under oaks in mixed forest. Spores are inamyloid, globose 9-10µ.

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Proposed Names

ret
82% (1)
Based on chemical features: nrLSU sequence

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Comments

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We have a very good sequence of the nrLSU gene for this species.
By: R. E. Tulloss (ret)
2019-11-25 11:29:25 CST (+0800)

It matches 99.9 to 100% with previously derived sequences for the same gene from Amanita carolinensis. Your material also matches __carolinensis in having the center of the cap very similar to the center of the cap in A. fulva, while the rest of the cap is more yellow or tan than in A. fulva.

As we continue to review material of the A. fulva “group” in North America, we are finding some distinct species like the present one. But some species that seemed distinct at first are being seen now as a part of Amanita fulva. The cluster of things called “Amanita amerifulva” is becoming smaller and smaller as more time passes and more data comes in.

The place to keep track of the current set of names is here:

http://www.amanitaceae.org?stirps%20Fulva

Thanks, as alwasy for sending interesting material our way.

Very best,

Rod