Observation 175574: Amanita subsolitaria (Murrill) Murrill
When: 2014-08-28
(39.7742° -74.5332° )

Notes: > A solitary specimen (just like the name suggests) growing in grass and pine needle duff in pine-oak woods on the edge of a dirt road.
> Despite being reported as common in the coastal planes, this is the first time I’ve seen this species
> Macroscopic features, such as the shape and texture of the bulb (smooth and carrot-like), the texture of the universal veil on the cap, a couple of forking gills (see pic), pink discoloration of a gill blade (see pic), and brown staining of the stipe on handling (see pic), all suggest A. subsolitaria even before spore measurements were taken.
> The odor initially appeared to be pleasant to my nose affected by seasonal allergies
> The bulb was wrapped in a wet paper towel, and the cap was allowed to expand overnight to drop spores.
> Final size measurements (8/29/14): cap diameter = 10.7 cm; stipe length (apex to tip of the bulb) = 13 cm; overall height = 14.5 cm.
> Unfortunately, the basidiome was taken over by a white fluffy mold, so only two large fragments of the cap could be salvaged for the herbarium.

Amyloid in Melzer’s;
[20/1/1]: L x W = (10.5-) 10.7-13.5 (-14.2) x 4.7-5.6 μm;
L’ x W’ = 12.2 × 5.0 μm;
Q = (2.14-) 2.25-2.64 (-2.9); Q’ = 2.45; all cylindric.

These measurements are in good agreement with the data posted on www.amanitaceae.org/?Amanita%20subsolitaria


Photographed 30 min after picking
The partially expanded cap; photographed 30 min after picking
The partially expanded cap; photographed 30 min after picking
The partial veil is 1-ply and very flimsy
Two forking gills were found
Brown staining on the stipe due to handling
A pink gill blade and white mold are visible
The expanded cap
Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 μm
Mounted in Melzer’s and viewed at x1000; 1 div = 0.465 μm

Proposed Names

85% (1)
Eye3 Eyes3
Used references: Amanitaceae.org
Based on microscopic features: Spore measurements in good agreement with published data

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Igor,
By: groundhog
2014-10-14 11:20:00 CDT (-0500)

This material has been received and accessioned to Rod’s herbarium. We have scheduled it for DNA sequencing.

Created: 2014-08-29 15:55:14 CDT (-0500)
Last modified: 2014-08-29 16:13:06 CDT (-0500)
Viewed: 48 times, last viewed: 2016-10-21 05:32:00 CDT (-0500)
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