Observation 175244: Amanita sect. Amidella
When: 2014-08-23
(39.8136° -74.5489° )
Herbarium specimen reported

Notes: > A single immature specimen found growing in blueberry bushes surrounded by pitch pines.
> Lack of pink powder on stipe seems to eliminate A. volvata.
> The specimen was brought home and wrapped in a wet paper towel. The cap expanded overnight and produced a copious spore print.
> Final measurements before drying: cap = 7 cm wide; stipe = 14.5 cm long; volval sack = 4 cm deep (measured from the bottom to the tip of a limb). This mushroom could be too big for A. pseudovolvata.
> Rusty orange stains visible on the expanded cap developed on their own 24 hrs post collection.
> The lined cap margin became visible only at maturity.
> When cut in half for drying, the context at the juncture of stipe/cap stained faint pink; the same patchy staining was observed on the exposed stipe context.

Microscopy:
Amyloid spores in Melzer’s;
[20/1/1] L x W = 8.8-10.7 (-11.2) x 5.6-6.3 (-6.5) μm;
L’ x W’ = 9.9 × 5.9 μm;
Q = 1.58-1.75 (-1.83); Q’ = 1.68; spore shape = predominantly elongate (18/20)

Images

448774
Immature specimen collected on 8/23
448775
Immature specimen collected on 8/23
448776
Immature specimen collected on 8/23
448777
Immature specimen collected on 8/23
448778
Photographed after maturation, late afternoon 8/24
448779
Photographed after maturation, late afternoon 8/24
448780
Photographed after maturation, late afternoon 8/24
448781
Photographed after maturation, late afternoon 8/24
448782
Photographed after maturation, late afternoon 8/24
448783
Photographed after maturation, late afternoon 8/24
449143
Mounted in Melzer’s & viewed at x1000; 1 div = 0.465 μm

Proposed Names

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Comments

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Thanks Igor,
By: groundhog
2014-10-14 12:27:14 EDT (-0400)

This material has been received and accessioned to Rod’s herbarium.
-Naomi

Created: 2014-08-25 00:58:16 EDT (-0400)
Last modified: 2014-08-26 01:15:33 EDT (-0400)
Viewed: 31 times, last viewed: 2016-10-21 15:41:35 EDT (-0400)
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