Observation 262720: Amanita amerivirosa Tulloss nom. prov.
When: 2016-09-16

Notes: Habitat: Woodland Area including birch and oak trees
Substrate: Growing alone in damp soil around 4 feet from an oak tree
Pileus Description—————-
Color: Pure white
Margin: Not striate smooth
Shape: Campanulate to convex
Surface: Smooth/ dull like an egg
Diameter: 6.2 cm
30% KOH on Cap: Turned yellow
Smell & Taste: Pungent scent, Taste N/A
Sport Print: White deposit
Stipe Description—————-
Color: Cream white
Location: Central
Base: Inserted
Surface: Fibrillose
Shape & Context: Equal with a bulbous base
Length/ Width: 13 × 1.5 cm
Annulus: Single-edged
Volva Type: Circumsessile
Gills/Lamellae Description—————
Color: White
Attachment: Free/ Crowded
Margin: Even/ Regular
Microscopic Characteristics——————
Spore Shape: Broadly ellipsoidal (Amyloid)
Spore Ornamentations: none/smooth
Spore Dimension Range:
(8.5-9.5) by (7.5-8)
Spore Dimension Average:
8.9 by 7.79

Proposed Names

30% (2)
Used references
Based on microscopic features
Based on chemical features: Cap turned yellow with the addition of 30% KOH.
-3% (2)
Eye3
Recognized by sight
Used references
Based on microscopic features: and DNA
72% (3)
Eye3 Eyes3
Recognized by sight
Used references: Dr. Rod Tolluss
Based on microscopic features
Based on chemical features: DNA evidence

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
You are welcome, Erin.
By: R. E. Tulloss (ret)
2016-12-07 00:09:41 CST (-0500)

R

Special Thanks to Identifier
By: Erin Mahony (ermahony)
2016-12-06 17:11:34 CST (-0500)

Thank you Dr. Rod Tolluss for helping me identify my specimen as Amanita amerivirosa via DNA evidence.

Dear Erin,
By: R. E. Tulloss (ret)
2016-11-28 10:17:21 CST (-0500)

You offer a nice description of your material. One thing that would be useful is to look for two-spored basidia on the gills of your specimen. Since there are other white destroying angels in your area (in addition to bisporigera), it would be very interesting to know if your species has two-spored basidia (defining character of bisporigera) or not.

Very best,

Rod Tulloss

Created: 2016-11-28 00:09:19 CST (-0500)
Last modified: 2016-12-07 00:07:32 CST (-0500)
Viewed: 78 times, last viewed: 2017-02-18 03:29:30 CST (-0500)
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