Observation 32001: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2010-01-13
Herbarium specimen reported

Notes: Attempting to get spore drop.
I have seen this species before…veil reddens, gills gray, veil clings to cap, banded stipe, close volva.

Images

74231
after a night in the fridge, and following extensive handling at the BAMS meeting.
74232
after a night in the fridge, and following extensive handling at the BAMS meeting.
74233
after a night in the fridge, and following extensive handling at the BAMS meeting.
74234
after a night in the fridge, and following extensive handling at the BAMS meeting.
74741
from spore drop. large, thick walled spores with prominant hilar appendage. in KOH at 1000×.
74742
from spore drop. large, thick walled spores with prominant hilar appendage. in KOH at 1000×.
74743
from spore drop. large, thick walled spores with prominant hilar appendage. in KOH at 1000×.
74744
from spore drop. large, thick walled spores with prominant hilar appendage. in KOH at 1000×.
74747
74748
74749
75495
peeled back UV to expose gray cap.
75496
note striations at cap edge, waaaaaay free gills.
75497
inamyloid spores. 1000x in Meltzers. Note thick walls!

Proposed Names

57% (1)
Eye3 Eyes3
Recognized by sight: from Richard Sullivan’s Canyon, CA collection.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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since there appeared to be some controversy around this sighting…
By: Debbie Viess (amanitarita)
2010-01-25 12:19:19 CST (-0500)

I went back and looked a bit harder. Spores still thick walled, and inamyloid.
Under the extensive universal veil is a more typical grisette, with a gray cap and striations at the cap edge. Gills broadly free. Inamyloid spores, in combo
with macro characters, make this a vaginate amanita rather than a lepidella, despite that fluffy white UV.

Recently redried this (amanitas can absorb water from the air!); will do a section for gill trama orientation, but there is no doubt in my mind that what we have here is an unusual grisette.

Spores(from spore drop): inamyloid, thick walled, subglobose, some with oil drop.
range 9-14 × 8-12 microns
10.5 × 9.0
11 × 9
12 × 10
14 × 12
10 × 9
10 × 8
12 × 11
9 × 9

Orson Miller (a few years back) named a new Amanita and…
By: R. E. Tulloss (ret)
2010-01-20 20:39:40 CST (-0500)

didn’t check the stipe tissue. I reviewed the type and discussed it with Else Vellinga, she agreed that it was a lepiotaceous fungus. Miller didn’t report the stipe tissue in his description. I don’t think he had examined it. I recommend never taking risks when it comes down to brass tacks. And the gill trama and the stipe tissue are the two brass-est of tacks in Amanita.

I remember the earlier photos but hadn’t associated them with the new photos at all. Wow. Refrigeration isn’t to friendly from this guy’s point of view. I’ll be interested to see her.

Very best,

R.

it looked much different in situ….
By: Debbie Viess (amanitarita)
2010-01-20 14:54:54 CST (-0500)

UV appears somewhat flocculent before it all gets beaten down with handling and age.

here’s a link to the original obs:
http://mushroomobserver.org/31989?search_seq=1212984

which amanitas show thick walled spores?
By: Debbie Viess (amanitarita)
2010-01-20 14:49:37 CST (-0500)

these are around a micron in thickness.

to my eye, it is clearly an amanita of some kind, and most likely one of the unnamed CA grisettes…do you have doubts as to the genus?

enlarge the photos to see spore detail.
By: Debbie Viess (amanitarita)
2010-01-20 13:01:47 CST (-0500)
I bite.
By: R. E. Tulloss (ret)
2010-01-20 12:28:09 CST (-0500)

I can’t see to well in the photos. I’ll be glad to look at it myself. The mushroom itself is kind of string looking. Did it have typical amanita stipe tissue?

There are amanitas with occasional or relatively frequent spores with notably thickened walls. Normally you see both the inner and outer surfaces of the wall as very thin lines separated by a space of (more or less) about half a micron.

Very best,

Rod

OMG. check out these thick walled spores!
By: Debbie Viess (amanitarita)
2010-01-19 11:16:59 CST (-0500)

Have you ever seen their like in a amanita??! They are from spore-drop, I have the dessicata and I’m pretty sure that I have two more identical fruit bodies somewhere in my jumble of amanita collections…haven’t quite gotten to the stage of dedicating my garage as temperature controlled personal herbarium (like you, Rod!)

Created: 2010-01-14 15:38:39 CST (-0500)
Last modified: 2012-06-06 17:39:21 CDT (-0400)
Viewed: 223 times, last viewed: 2017-06-06 10:07:25 CDT (-0400)
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