From My understanding the name of this species has been changed. It was once considered Amanita muscaria var. formosa. Now it is A. Ameramuscaria. This particular one has a long stipe. this specimen is still a bit immature Found growing under Eastern White pine. spore print is white

[admin – Sat Aug 14 02:07:39 +0000 2010]: Changed location name from ‘West shore Boat ramp area Plum Orchard Lake Wildlife Management Area Fayette Co. West Virgnina’ to ‘Plum Orchard Lake Wildlife Management Area, Fayette Co., West Virginia, USA’


Proposed Names

32% (2)
Recognized by sight: found growing under pine
Used references: Rod Tullose on Mushroom of West Virgnina and centeral applalations. Roody page 56

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Index Fungorum…
By: R. E. Tulloss (ret)
2010-03-23 11:21:30 CDT (-0400)

Index Fungorum is a collection of names without regard as to the use or application of the name. To judge how a name is to be applied, its original description, its defining type, and present day understanding of its taxonomic relation with other taxa are important. Amanita muscaria var. formosa was named by the Dutch mycologist C. H. Persoon based on European material. As time has passed in the late 20th and early 2ast Centuries, mycologists are more and more convinced that Old European names, especially of mycorrhizal fungi (long used in the U.S. and other parts of the world) are only correctly applied in Europe and geographically neigboring parts of the world. Moreover, in both the European A. muscaria and the N. American species under the provisional name of A. amerimuscaria have yellow, red, orange, white, and (very rarely) yellow and red striped fruiting bodies. At the moment, these different colored fruiting bodies do not seem to have evolved into separate taxa (even at the rank of variety). The taxonomic literature (my fault) has not kept up, and the provisional names have not been officially published.

The currently valid name that could be used for the yellow muscarioid taxon of the northeastern and north central part of North America is

Amanita muscaria subsp flavivolvata

despite the fact that it was originally described as having a red cap (which it does through a great deal of its range), it’s cap can also be white, orange, yellow, and mixture of colors due to the distribution of the color determining pigments (a yellow betaxanthin and a purple betapurpurin, where “beta” refers to beets, not to a Greek letter).

There’s a lot of comments discussing this issue on older observations of muscarioid taxa on this site.


var. formosa is still recognized
By: Annie (Annie)
2010-03-22 23:49:09 CDT (-0400)

Index Fungorum lists Amanita muscaria var. formosa. No mention of A. amerimuscaria. Here’s the link: