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Amanita elliptosperma
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Amanita elliptosperma

Common Name: Atkinson's Destroying Angel

Synonyms:

Substrate: Ground

Location: Hardwood Forests

Spore Color: White

Gill Color: White 

Comments: 

Let me start off by saying, this version differs a bit from what is listed on Amanitaceae.org for the species. There it lists no volval remnants, but this species clearly has thick volval remnants left on the cap. This was the best species name suggested however. We will wait and see how it works out.

This is one of the species that is very similar to Amanita bisporigera. All white mushroom, free gills, white spores, ring on stem, volva around the base. The quickest way to separate them is to put a drop of KOH on the cap. A. bisporigera will turn yellow, while the lookalikes, including this mushroom, will not. 

Aside from that, there are several things to look for. First, the volva at the base tends to be a bit thicker than with A. bisporigera. It will also often jet up one one side with a large lobe.

This mushroom should be considered to be deadly poisonous.

Lookalikes:  

Amanita bisporigera - the cap will yellow with the application of KOH. Amanita sp-S04 has narrower spores, otherwise is similar. Amanita magnivelaris has a thick, felted ring. 

Pictures:

Amanita elliptosperma

Amanita elliptosperma

Look for the large lobe on one side of the volva.

Amanita elliptosperma

Most of the mushrooms below were found after a significant period of rain. This starts to explain the slightly tattered appearance on some of them.

Amanita elliptosperma

Amanita elliptosperma

Volval remnants on cap.

Amanita elliptosperma

This cluster lacked the significant volva. ??

Amanita elliptosperma

Amanita elliptosperma

Amanita elliptosperma

Rain tattered cap.

Amanita elliptosperma

Amanita elliptosperma

Amanita elliptosperma

Beaten to hell by the rains.

9/27/12 - Griffey Woods - Bloomington, IN