Observation 149257: Amanita bulbosa (Schaeff.) Lam.
When: 2013-10-18
No herbarium specimen

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Hello, Eva.
By: R. E. Tulloss (ret)
2013-10-19 12:44:46 CDT (-0400)

So far as we know, the European Amanita bulbosa does not occur in North America. So far genetic and morphological evidence separates the North American citrina-like species from A. bulbosa (aka citrina)…and this includes both the supposed varieties of A. bulbosa, which may not really be distinct taxonomic entitites.

Because of the very pale color of your material in this observation, I am inclined to think that this material represents what is currently called "A. brunnescens var. straminea (aka A. sp-lavendula03) on the Amanitaceae studies website).

The yellow “variety” of A. bulbosa, and the citrina-like species of eastern North America other than brunnescens var. straminea all have a more intensely yellow cap than does your material.

See

http://www.amanitaceae.org?Amanita+sp-lavendula03

Given current molecular and morphological data, I believe the species depicted and described on that page to match the old A. brunnescens var. straminea (named from Mjchigan material collected in the 1930s). Notice that this mushroom will sometimes turn lavender in cold weatther. You may get a chance to see this phenomenon on the pale yellow material from your collecting sites in Ontario.

Very best,

Rod

Created: 2013-10-19 11:48:00 CDT (-0400)
Last modified: 2013-10-20 00:16:04 CDT (-0400)
Viewed: 26 times, last viewed: 2017-06-16 18:37:10 CDT (-0400)
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