Observation 20318: Conocybe aurea (J. Schäffer 1930) Hongo 1963
When: 2009-03-22
Herbarium specimen reported

Notes: Spores: L avg: 10.5 microns; W avg: 6.3 microns; rather thick walled, dark brown in KOH, germ 1-2 microns broad.

Clamps present.

Caulocystidia and cheilocystidia lecythiform with a distinct, short to medium length neck.

Growing with Feijoa sellowiana (pineapple guava) in lignin-rich, rootbound mulch in a half-wine barrel planter outside the Salvation Army Cafe on Mission Street (near intersection with Bay St.)

Young specimens showed a relatively cylindrical-conical cap, and were rather yellower and slightly viscid (see photo).


Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Pileipellis a hymeniform layer
Copyright © 2009 Christian F. Schwarz
Copyright © 2009 Christian F. Schwarz
Spores in KOH
Copyright © 2009 Christian F. Schwarz
Caulocystidia Type 1
Copyright © 2009 Christian F. Schwarz
Caulocystidia Type 1 and Type 2
Copyright © 2009 Christian F. Schwarz
Caulocystidia Type 2

Proposed Names

-57% (1)
Recognized by sight
Based on microscopic features
57% (1)
Eye3 Eyes3
Recognized by sight: Yellow color, cap shiny when young
Used references: Mushrooms of the PNW

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Rocky Houghtby
2014-12-27 16:36:13 HST (-1000)

I simply meant cystidia. I guess I have organelles on the brain. The thought of a key requiring foreknowledge of spitzenkörper length is pretty darn amusing.

By: Christian (Christian Schwarz)
2014-12-27 13:47:30 HST (-1000)

I’m not familiar with the term organelles in reference to mushroom microscopy – what are those? How do I look for the,?

Very nice
By: Rocky Houghtby
2014-12-27 10:41:53 HST (-1000)

Micrographs, Christian. Measurements of the organelles would be really nice here. Did you try mounting any of this in ammonium?

More info?
By: Byrain
2014-12-27 09:36:53 HST (-1000)

“2. Cheilocystidia with capitulum 4.0–8.0(9.0) µm broad, on the average over 5.0 µm.
2. Cheilocystidia with capitulum 3.0–5.5(6.0) µm broad, on the average less than 5.0 µm”

“3. Spores on the average over 10.0 µm long, moderately to rather thick-walled, orange-brown to rusty brown in ammonia
4. Basidiocarps relatively large: pileus (10)15–42 mm, stipe 40–125(160) × 2–4 mm with basal bulb up to 7 mm thick; lamellae, L = 18–32; pileus often with olivaceous tinge; ammonia reaction usually positive and fast, occasionally only after several hours, rarely negative . . . . . . . . . . . . . . . . . . . . . .8. C. subovalis
4. Basidiocarps small to medium: pileus 5–18(25) mm, stipe 25–60(80) × 0.7–2 mm, base up to 3.5 mm thick; lamellae L =12–18; pileus without olivaceous tinge; ammonia reaction negative . . . . . . . . . . .9. C. juniana
3. Spores on the average less than 10.0 µm long, thick-walled or thin-walled”

“20. Basidia predominantly 4-spored; spores on the average less than 13.0 µm long; stipe not rooting
21. Pileus bright yellow to apricot-yellow in young basidiocarps, gradually turning rusty brown in age but bright yellow in dry condition, also in exsiccata; ammonia reaction positive . . .2. C. aurea
21. Pileus without bright yellow colours; ammonia reaction positive or negative
22. Lower part of stipe thickened and buried in sand; habitat usually in coastal dunes; pileus”

(From fan6)

cheilocystidia on the stipe
By: Christian (Christian Schwarz)
2009-04-16 07:08:03 HST (-1000)

Yeah, Leptonia does the same thing with cheilocystidia (and sometimes even basidia) at the very topmost part of the stipe. These sections were taken a little farther down.

Looks pretty good
By: Douglas Smith (douglas)
2009-04-16 06:38:18 HST (-1000)

This all looks pretty good. One thing popped up in my mind, to watch for, how far up the stipe did sample for the caulocystidia? There is the fact that the gills are attached to the stipe, and the edge of the gills can run slightly down the stipe, but only slightly. If you sample the caulocystidia right at the very top of the stipe, you can see cheilocytidia on the stipe. But this is only right at the top, the top 1-2 mm or so. If you didn’t do that, then this looks pretty good.

These are slightly lighter, and more yellow that other examples in this area, but that isn’t bad, just interesting. There are so few photos of this species that are actually backed up with the micro details we don’t know that much about the variable macro features in this area.

Created: 2009-04-15 11:46:55 HST (-1000)
Last modified: 2012-08-27 06:41:26 HST (-1000)
Viewed: 217 times, last viewed: 2016-10-25 21:37:07 HST (-1000)
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