Observation 191914: Amanita sect. Amanita

This fungus was found underneath a tree growing next to it and in grass. They were growing 2-3 inches from one another, and some were growing in clusters.

It had no distinct smell.

The pileus size ranged from 2.4 – 7.3 cm in diameter, and they had a cream color. The surface was areolate and cracked, and the margin was smooth and not striate. The pileal shape ranged from broadly parabolic to moderately indented. The color inside was white.

The gills had a free attachment, and they had an even margin. They were creamy white in color, and from the stipe, they ranged from .5 – 3.5 cm long. They were .5 mm wide, and they ranged from 1 mm to 2 mm in spacing.

There was a single-edged annulus around the stipe that was a creamy white color.

The stipe was central, and it had a smooth and mildly fibrillose surface. It was 4.1 – 8.6 cm long, and it was .5 cm – 1.3 cm wide. It had a bulbous shape to it, and it was hollow inside. The base was institutious, and inside the stipe, it was white.

The volva of this fungus was circumsessile.

No spore print was obtained for this fungus, but it was assumed that the spore color was white. The spore shape was circular, and they ranged from 5.0-8.2 micrometers in diameter.

Species Lists


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Proposed Names

29% (2)
Recognized by sight
Used references: Mushrooms of the Midwest by Michael Kuo and Andrew S. Methven
Based on microscopic features: Spores
54% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: R. E. Tulloss (ret)
2014-12-07 10:20:19 MST (-0700)

The sectioned stems are a clue that you don’t have Amanita abrupta. The bulb is too round. The bulb of abrupt is usually much flattened on the top (hence the name of the species). The bottom of the bulb tends come to a point (but has not rooting part). From the point at the bottom of the bulb, thickish white “cables” (pseudoroots) of hyphae bracnch out. in a few directions.

I think what you have here is a species of sect. Amanita. The volval remnants could match either a pantherinoid or a muscarioid taxon.

The spores will most likely be inamyloid, rather than the amyloid ones that one would expect from abrupta.

Very best,


Created: 2014-12-05 17:27:32 MST (-0700)
Last modified: 2014-12-07 10:22:01 MST (-0700)
Viewed: 38 times, last viewed: 2017-08-31 22:50:35 MST (-0700)
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