Observation 25726: Amanita bisporigera G.F. Atk.
When: 2009-09-25
Herbarium specimen reported

Notes: Found Under White Oak. Growing alone, KOH yellow on cap surface and stem. Since it is fall im starting to see more and more of these. There not as big as A. bisporigera and they are more slender.

Images

58022
58023
58024
58025
58030
spores under microscope. and a couple of other views
58031
spores under microscope. and a couple of other views
58032
spores under microscope. and a couple of other views
58033
spores under microscope. and a couple of other views

Proposed Names

2% (3)
Eye3
Recognized by sight: found under white Oak
Used references: Mushrooms of West Virginia and the Central Appalachians Roody page 42
Based on microscopic features: spores round about 8 microns smooth and amyloid contains four spores per basidium.
Based on chemical features: yellow in KOH
40% (3)
Eyes3
Recognized by sight: A. virosa is a European species
Based on chemical features: yellow in KOH

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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A. Virosa
By: Eddee (eddeeee)
2009-09-25 18:01:03 PDT (-0700)

Allen I don’t understand how you can come up to this conclusion. Based on Microscopic exam, the Basidium of this specimen produced 4 spores per basidium. A bisporigera produces 2 spores per basidiumm. according to the literature A bisporigera also occurs earlier in season more where as A virosa appears later in the fall.

Created: 2009-09-25 09:04:04 PDT (-0700)
Last modified: 2009-09-25 09:04:04 PDT (-0700)
Viewed: 105 times, last viewed: 2016-09-28 09:21:47 PDT (-0700)
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