Observation 19949: Prunulus purus (Pers.) Murrill

this was an odd one…fruiting out of an incredibly thick mat of yellow-green moss, in a persistantly damp area; mostly shaded and covered in native bunch grasses and maidenhair ferns.

the mushroom was very perishable…my tiny contumyces did way better getting home!

pale, off white cap (with odd yellowish color on one half…stain from the damp moss?). very rounded bell-shaped cap, with very thick, deeply notched gills.
stipe of a similar color, fragile. radishy odor. no spore print.

colors very much changed and fruit body starting to melt by the next morning when i took the photo.

no spore print, altho gills got dark (not necessarily from spores, tho).

wait a minute, what if the spores ARE black…could this be a panaeolus??!

[admin – Sat Aug 14 02:03:15 +0000 2010]: Changed location name from ‘Mt. Diablo State Park, Falls Trail, Contra Costa CO, CA’ to ‘Falls Trail, Mount Diablo State Park, Contra Costa Co., California, USA



Proposed Names

24% (3)
Recognized by sight
63% (3)
Recognized by sight: if small spores w/in the realm of the reasonable, then other characters fit pura.
78% (2)
Eye3 Eyes3
Recognized by sight: Irene did; I suspected as much.
Based on microscopic features: Dimi confirmed it.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Would you?
By: Johannes Harnisch (Johann Harnisch)
2009-05-21 15:56:31 -08 (-0800)

try takking these in a dark place and see if the gills glow?

see new micrographs/comments by Christian Schwartz
By: Debbie Viess (amanitarita)
2009-05-19 08:59:25 -08 (-0800)

Some notes:
1, 2, 3. Pileipellis is a cutis of inflated hyphae with a suprapellis of very thin hyphae.
4. Spores NOT AMYLOID, ellipsoid to subcylindric, 6.4 × 3.7 Q avg = 1.5 – 1.755,
6. Caulocystidia at apex of stipe 100 microns long, thin to thick, cylindrical to slightly bent, densely covered with many short, round excresences.
7. Inner hyphae of lower stipe with many refractive granules in Congo Red and KOH (looked like stars!)
8. Base of stipe with hyphae slightly green in KOH! This is important – could lead to Gymnopus

Also, cheilocystidia and pleurocystidia were present – lageniform or occassionally cylindrical or slightly clavate, 40 – 42 microns long, walls slightly thickened, hyaline in Melzers.

By: Alan Rockefeller (Alan Rockefeller)
2009-04-04 22:30:15 -08 (-0800)

Those spores are smaller than most Mycena spores.

Not Mycena. Something more interesting.
By: Dimitar Bojantchev (dimitar)
2009-04-04 20:11:05 -08 (-0800)

Debbie, excellent job for looking at the spores and their features!
Now lets do the analytical part and some more diagnostics. You have
very good evidence right at the start by looking at the spores that
this is something more interesting than Mycena. Check the cystidia and
pileipellis. The roundish, amyloid spores remind one of Baeospora and
a couple of related LM Genera. The lavender colors should help a lot.

Great collection.

gentlemen (and women), we have a mycena!
By: Debbie Viess (amanitarita)
2009-04-04 18:51:31 -08 (-0800)

gills came out of the dryer slightly lavender.

spores colorless in water, amyloid in Meltzer’s, smooth, elliptical to rounded.
4-4.5 × 3 microns.
spores a bit small for Prunulus purus, but certainly NOT a panaeolus!

not Panaeolus
By: Alan Rockefeller (Alan Rockefeller)
2009-04-03 14:42:51 -08 (-0800)

Maybe Mycena.

A long shot
By: Irene Andersson (irenea)
2009-04-02 22:51:24 -08 (-0800)

Mycena pura?

Created: 2009-04-02 19:22:08 -08 (-0800)
Last modified: 2010-08-13 18:03:15 -08 (-0800)
Viewed: 237 times, last viewed: 2018-07-19 20:40:26 -08 (-0800)
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