Observation 207874: Amanita solaniolens H.L. Stewart & Grund

When: 2015-06-26

Collection location: Maple Shade, New Jersey, USA [Click for map]

39.9477° -74.9802°

Who: I. G. Safonov (IGSafonov)

Specimen available

> A single specimen growing on the edge of a pond under two different species of birch trees (there were no other host trees nearby, so the birch is definitely the pertinent one).
> Cap = oval-shaped, 3.7 × 3.1 cm
> Overall height of fb = 8.7 cm
> The membranous annulus appeared faintly yellow
> The brown staining on the stipe/bulb is original and has nothing to do with handling

Spores are amyloid in Melzer’s;
[21/1/1]: L x W = (6.7-) 7.0-8.4 × 6.3-7.9 (-8.4) μm;
L x W = 7.6 × 7.2 μm;
Q = 1.03-1.11, globose to subglobose; Q = 1.06


Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 micron

Proposed Names

57% (1)
Recognized by sight: A non-virgate cap and annulate stipe with a bulb
Based on microscopic features: Amyloid spores
61% (2)
Eye3 Eyes3
Recognized by sight: The umbo is not typical, in my experience.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: groundhog
2015-08-04 20:37:09 CEST (+0200)

We have received your specimens and have accessioned it into Rod’s Herbarium!

I have found solaniolens..
By: Dave W (Dave W)
2015-06-28 03:11:52 CEST (+0200)

near a variety of different tree types. The basal bulb has seemed variable to me, as well. I’m a bit surprised that solaniolens has not been split into more than one species.

It’s the pronounced umbo that strikes me as atypical for solaniolens.

Good call, Dave!
By: I. G. Safonov (IGSafonov)
2015-06-28 01:58:47 CEST (+0200)

I typically use Rod’s regional website for Amanitas of PA, NJ and NY (http://www.amanitaceae.org/?US+-+NJ+and+PA). A. cf. solaniolens (= species N20), #99 on the list, did catch my eye due to the color of the ring, but I dismissed from consideration because I didn’t see the yellow volva or the abrupt, brunescens-type bulb, and there was definitely no hemlock in the area (now we know it’s not partial to it). Obviously, the less-than-ideal condition of the fb led me away from the ID.
By the way, the dried specimen indeed smells like an old potato!

Created: 2015-06-27 21:08:16 CEST (+0200)
Last modified: 2018-01-06 01:52:44 CET (+0100)
Viewed: 65 times, last viewed: 2018-02-27 17:47:15 CET (+0100)
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