Observation 128639: Panaeolus goossensiae Beeli

When: 2013-02-14

Collection location: Gainesville, Florida, USA [Click for map]

Who: Richard Kneal (bloodworm)

Specimen available

spores = 11.9 × 8.4
10.6 – 12.8 × 7.0 – 8.9

pleurocystidia absent.

Proposed Names

26% (3)
Recognized by sight
61% (2)
Eye3 Eyes3
Recognized by sight
Used references: Byrain

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Richard Kneal (bloodworm)
2013-02-15 18:42:52 PST (-0800)

the spore shape looks off to me for Panaeolus papilionaceus (compare w/ Workman).
they are also too small for papilionaceus…

Panaeolus goossensiae sounds real close!!

By: Byrain
2013-02-15 18:37:41 PST (-0800)

Look close to the P. papilionaceus type I think (Someone please correct me if I’m wrong), but are a bit small for those species. Looking at the section Laevispora, P. goossensiae has similar spores that are the right size, its known from Africa (On the ground in swampy woods) and Hawaii (Cow dung). I am missing the page with the discussion part of the description and any possible illustrations though…

From Gerhardt’s key:

Spores in microscope very dark, opaque, about 10-13 μm long, with distinctly prominent germ pore and nearly parallel sidelines (similar papilionaceus type) …………………………. Panaeolus goossensiae (24)

By: Byrain
2013-02-14 18:47:02 PST (-0800)

I have seen it on what I think are paps too. I still have a collection I have been meaning to scope, I don’t often find mushrooms on dung here.

i’ve seem it before…
By: Richard Kneal (bloodworm)
2013-02-14 18:44:04 PST (-0800)

on paps (or what i thought were paps).

I missed that
By: Byrain
2013-02-14 18:40:28 PST (-0800)

I don’t think I have ever seen a ring zone on the stem of P. cinctulus or any related species.

By: Richard Kneal (bloodworm)
2013-02-14 18:35:16 PST (-0800)

on the cap margin, no.
on the stipe, there are black spore deposits which look to form a ring.

By: Byrain
2013-02-14 18:20:31 PST (-0800)

I still can’t tell if its present or not from the pictures, in all your photos I see little specks of what could be left over from one, covered with jet black spores. Also, I’m not sure if the lack of dung necessarily rules out other species in section Panaeolus (With P. papilionaceus), P. rubricaulis is described as growing “on fertilized soil (auf gedüngten boden)”, but that species is known from Asia… (The caps should be distinctly hygrophanous and it should have sulphidia)

By: Richard Kneal (bloodworm)
2013-02-14 18:06:37 PST (-0800)

just added a clear pic of the cap margin.

The lack of dung
By: Byrain
2013-02-14 18:00:04 PST (-0800)

argues against P. papilionaceus, I still think I see faint traces of a veil, but I’m not quite sure.

By: Richard Kneal (bloodworm)
2013-02-14 17:53:56 PST (-0800)

long grass.
did not look recently sodded to me.
the margin lacks veil remnants and the color is a bit too dark for paps, imo.
any input you have is greatly appreciated.


By: Byrain
2013-02-14 17:35:05 PST (-0800)

Doesn’t really look like P. cinctulus, looks closer to P. papilionaceus.

Created: 2013-02-14 16:37:22 PST (-0800)
Last modified: 2013-02-16 19:22:00 PST (-0800)
Viewed: 370 times, last viewed: 2018-05-22 21:35:59 PDT (-0700)
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