Observation 136043: Leucoagaricus Locq. ex Singer
When: 2013-06-10
No herbarium specimen

Proposed Names

47% (2)
Eye3
Recognized by sight
28% (1)
Recognized by sight: to the extent that any members possess both a UV and PV
-28% (1)
Recognized by sight
28% (1)
Recognized by sight
28% (1)
Recognized by sight
56% (1)
Eyes3
Used references: Else

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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else.
By: Danny Newman (myxomop)
2013-07-02 10:10:03 CEST (+0200)

have you seen this? what do you think?

and another…
By: Danny Newman (myxomop)
2013-06-18 21:03:48 CEST (+0200)

http://www.ingentaconnect.com/...

Macrolepiota rhodosperma var. velicopia

Else is either the primary or co-author on literally all of these papers…

By: Danny Newman (myxomop)
2013-06-18 21:00:20 CEST (+0200)

nice find, Elsa. I’d not heard of that genus before. It is, apparently, defunct, synonymized with Macrolepiota, but the following article:

http://nature.berkeley.edu/...

adds at least two names to our list of volvate members of Agaricaceae; Macrolepiota velosa and M. pulchella. Given the written description and sketches, neither appears to be a good match here, but perhaps there are some Neotropical equivalents in the world of volvate Macrolepiota.

An “adnate collarium” sounds like a description of gill attachment. Collaria are usually talked about in reference to Marasmius. In that context, the term refers to a sort of ring of tissue to which the gills are attached, which is separate from the stipe. It is essentially another way in which gills can be free. See Marasmius rotula and others for a clear example of this trait. An adnate collarium, presumably, is one in which the gills attach to the collarium, which attache to the stipe adnately.

Hopefully Else chimes in soon. She is bound to know a great deal more on both topics.

Is Volvolepiota similar to any of the names
By: Elsa (pinknailsgirl)
2013-06-18 20:35:25 CEST (+0200)

that you mentioned? I read something about Volvolepiota brunnea, which has a “adnate collarium”, what’s that?

The only genus in Agaricaceae
By: Danny Newman (myxomop)
2013-06-18 19:30:46 CEST (+0200)

I can find which is recorded as having both a UV and PV is Clarkeinda, but this would need to show serious signs of chocolate brown spores by now for that to be even remotely close. very curious indeed.

edit: scratch that. meet Leucoagaricus amanitoides

http://nature.berkeley.edu/...

Several other occasionally to necessarily volvate species are mentioned within:

Leucoagaricus gaillardii
Leucoagaricus subvolvatus
Leucoagaricus volvatus
Leucoagaricus bivelatus
Lepiota volvatula

The penultimate was described from Panama, but has a “bluish black pileus.” The last of the list was described from Martinique, but has a “thin and fragile, brownish pileus, which is sulcate-plicate.” L. subvolvatus and L. volvatus are both European, and L. gallardii shares the amanitoid stockiness and sturdiness of the taxon described in the paper.

The end of the paper lists four other similar taxa:

Lepiota amanitiformis Murrill was described from conservatories of the New York Botanical Garden. Its pileus surface is dry, and reddish brown, the stipe very short and thick, usually tapering upward from an abrupt, globose bulb at the base, white or tinged with reddish-brown ( Murrill, 1914).
Lepiota amanitoides Beeli, with dingy white pileus with yellowish stains, and a bulbous stipe base, turned out to be an Amanita species (Bas 1969).
Lepiota subamanitiformis S. Imai from Hokkaido (Japan) has a red-brown pileus, and the margin of the annulus is given as ‘incarnate’ (Imai 1938).
Lepiota subamanitiformis Dennis is characterized by a pale brown pileus with darker umbo, and was described from Trinidad (Dennis 1952).

of which only the last one seems to stand a chance of resembling the subject of this observation.

Here it is a very interesting mushroom
By: Elsa (pinknailsgirl)
2013-06-18 19:22:19 CEST (+0200)

Strange ring (is it double?) on Amanita, strange volva on Leucoagaricus, I searched something between, but it’s very different from this. I look forward to know what it is.

UV remnants
By: Danny Newman (myxomop)
2013-06-11 16:23:48 CEST (+0200)

or just fraying/peeling of stipe exterior? this looks convincingly volvate to me.

Created: 2013-06-10 22:24:10 CEST (+0200)
Last modified: 2014-11-26 04:56:21 CET (+0100)
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