Observation 212440: Amanita sect. Phalloideae (Fr.) Singer

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Recognized by sight
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Based on chemical features: KOH negative on cap
56% (1)
Recognized by sight

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Upstanding volval limb and pointed bottom of bulb sometimes have been …
By: R. E. Tulloss (ret)
2015-08-10 21:17:45 CDT (-0500)

an indicator for me that the species (in the Phalloideae) will have ellipsoid spores…in this case, a possibility might be A. elliptosperma. This latter species does not turn yellow in KOH. In North America, my impression is that several ellipsoid-spored, white Phalloideae do not have the yellowing reaction.

In the ellipsoid-spored group, magnivelaris is easiest to separate because of the large, rather thick, felted skirt on the stem. The species with membranous, unfelted skirts go under a lot of names and the potential synonymy is not well understood. Some of the names themselves are not well understood. Species other than magnivelaris, elliptosperma, and my “sp-S05” (if it is truly distinct) seem to have distributions to the south of what have been my most common collecting areas; so I mostly have knowledge from dried material in the cases (for example) of Murrill’s taxa described from Florida.

Very best,


Created: 2015-08-10 21:03:01 CDT (-0500)
Last modified: 2015-08-10 22:44:16 CDT (-0500)
Viewed: 21 times, last viewed: 2016-10-22 12:48:41 CDT (-0500)
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