Observation 182031: Coprinellus sect. Micacei

Images

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466754
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Cheilocystidia
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Pleurocystidium
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Pleurocystidium
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Caulocystidia
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The gill edge is toward the upper left. The grains of rice in the middle of the gill mess are pleurocystidia.
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Caulocystidia
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Caulocystidia
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Caulocystidia
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Caulocystidia
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macroscopic pleurocystidia(!)(?)

Proposed Names

61% (2)
Eye3 Eyes3
Recognized by sight
Used references: http://www.grzyby.pl/...
Based on microscopic features: Ellipsoid spores.
30% (2)
Recognized by sight: Pale color
Used references: FAN6
http://www.grzyby.pl/...
Based on microscopic features: Ovoid spores with caulocystidia and pleurocystidia.
44% (2)
Recognized by sight
Used references
Based on microscopic features
3% (2)
Recognized by sight
Used references
Based on microscopic features

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Caulocystidia
By: Jacob Kalichman (Pulk)
2014-10-16 01:35:29 MDT (-0600)

Macroscopically, in bright light, the stems really don’t look pruinose, but they also really don’t look perfectly smooth. I just added 5 micrographs of caulocystidia, those were hard to find. “Stipe smooth or slightly floccose, caulocystidia absent or very sparse” seems to apply really well here.

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By: Byrain
2014-10-10 09:45:21 MDT (-0600)

Your pictures clearly show that pleurocystidia is not rare/absent, that saccharinus thread looks like it might be C. truncorum due to the pale cap (Pretty sure they mean the cap is supposed to be pale, not the mica granules), the op should check the Q values. I’m still thinking your spores are ovoid (Egg shaped) and there is always the possibility that this is none of the above. Also, I’m not sure what to think about caulocystidia, not finding them doesn’t necessarily mean they aren’t there, what kind of section are doing for the stem? That you found them at all makes me think more could be hiding. I think the choices are, A) C. truncorum, B) C. pallidissimus, or C) an unlisted species. Where is Europe-Coprinologist?

Edit: I’ve changed my mind and am leaning towards C. truncorum…

C. truncorum/saccharinus
By: Jacob Kalichman (Pulk)
2014-10-10 01:03:31 MDT (-0600)

I looked at Ulje, FAN6, “Mille et un Champignons” (Roux) (describes micaceus, saccharinus, pallidissimus), and flickr pics/comments from myco people (Herman Lambert, Renee Lebeuf, Labee Roland, Fernand Therrien, and Raymond McNeil)…

I made a cheap knockoff frankenstein table from those sources.

Relevant saccharinus thread on actafungorum

Veil texture is obviously granular, like C. micaceus. Stems appear completely smooth; that one pair of caulocystidia was difficult to find and I was looking close to the stem apex. Pleurocystidia are neither rare nor abundant. Cheilocystidia are present. Spores are ellipsoid to submitriform. Q = 1.61 (n = 15).

Criticism please, Byrain!

Do you have images?
By: Byrain
2014-10-09 16:02:23 MDT (-0600)

Specifically of the upper stem, if I look really hard at the second picture I think I can see a non-smooth stem, but its hard to tell… This is an issue I had when I scoped something similar a while back, determining if the caulocystidia was rare or not.

smooth stems
By: Jacob Kalichman (Pulk)
2014-10-09 15:34:28 MDT (-0600)

Just looked at some fresh ones. Not pruinose. Guess the caulocystidia really are rare!

Thanks for the key
By: Jacob Kalichman (Pulk)
2014-10-08 22:46:22 MDT (-0600)

I’m getting doubtful now…

I was interpreting pic #2 to be showing lots of caulocystidia. I hadn’t looked for them microscopically before, but the ones in pic #8 were hard to find…

One of the pics might be cheilo’s, but pleuro’s were definitely not hard to find, adding a couple pics.

FAN6 keys
By: Byrain
2014-10-08 22:20:56 MDT (-0600)

They aren’t mitiform as is illustrated for C. micaceus, see Ulje’s illustrations, Kuo is honestly not the best source for inky cap identification.
The key in FAN6 is a little updated. Do you happen any in focus shots showing the stem up close? Are you sure that is pleurocystidia and not cheilocystidia? Pleurocystidia should be rare/absent in C. micaceus. The European keys don’t seem to work that well for this group…

KEY SEVEN
Pileus medium-sized, somewhat fleshy, pale ochre, rust, or cinnamon; stipe 3–10 mm wide; veil made up of very
small, scattered, granular flocks, not covering entire pileus when young, microscopically of (sub)globose, hyalin, thin-
walled cells, not in chains; pileus subglobose to ovoid, only tardily expanding to campanulate.
1. Stipe smooth or slightly floccose, caulocystidia absent or very sparse; spores ellipsoid, ovoid, or submitriform.
2. Spores ovoid to submitriform, av. Q < 1.4; pileus usually real ochre-brown, sienna. . . . . . 100. C. saccharinus
2. Spores ellipsoid or ovoid, av. Q > 1.4; pileus usually pale ochre-brown, sometimes sienna. . 89. C. truncorum
1. Stipe pruinose of erect hairs, caulocystidia present; spores ovoid or mitriform.
3. Spores ovoid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90. C. pallidissimus
3. Spores (sub)mitriform.
4. Veil rather dark, pinkish brown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. rufopruinatus Romagn. in
Bull. trimest. Soc. mycol. Fr. 92: 205. 1976. Only known from France.
4. Veil pale, whitish, cream, or ochre. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87. C. micaceus

Spore shape
By: Jacob Kalichman (Pulk)
2014-10-08 22:18:44 MDT (-0600)

There are mitriform spores in all 3 spore micrographs…

Kuo calls C. micaceus spores “subelliptical to mitriform”…

sorry about that.
By: Jacob Kalichman (Pulk)
2014-10-08 22:04:58 MDT (-0600)
Please label your micrographs
By: Byrain
2014-10-08 21:58:07 MDT (-0600)

Its difficult to tell what part of the mushrooms you are looking at without context.

Created: 2014-10-08 21:53:59 MDT (-0600)
Last modified: 2014-10-16 02:01:46 MDT (-0600)
Viewed: 212 times, last viewed: 2016-12-07 05:04:35 MST (-0700)
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