Observation 199286: Pholiotina Fayod sect. Pholiotina

Proposed Names

-28% (1)
Recognized by sight
83% (1)
Eyes3
Recognized by sight: A more specific name for the annulate Pholiotina.
57% (1)
Recognized by sight: Membranous partial veil, spores < 10 µm, and mix of utriform, clavate, and lageniform cheilocystidia, germ pore apparent, but not > 1 µm wide.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Looks like
By: Christian (Christian Schwarz)
2015-02-20 14:52:05 PST (-0800)

P. hadrocystis seems like a good match – it’s the only one in FAN6 with both a membranous partial veil and utriform and clavate cheilocystidia (along with the lageniform cheilo that are present in many other members of the annulate group).

But the cheilo illustrations in FAN6 for P. vexans and P. rugosa look even more similar.

Cheilocystidia
By: Byrain
2015-02-20 14:43:14 PST (-0800)

It would probably be easier to decide on the cheilocystidia in person, from the illustration it seems to lean towards Pholiotina hadrocystis & P. arrhenii. The only two of the seven taxa in the Pholiotina sect. Pholiotina key that have not yet found any use in CA… So what are we at, 5 or 6 microscopically distinct taxa in CA? (There is confusion between P. rugosa and P. vexans in CA, the European concepts seem more clearly differentiated). We really should start getting a good bunch of these annulate Pholiotina collections sequenced.

5. Cheilocystidia lanceolate to lageniform, gradually passing into a narrow, cylindrical or tapering neck,
1.5–3.5(4.0) µm wide, not capitate; spores with distinct germ pore, 1.0–1.5 µm wide . . . . . . . .4. Ph. rugosa
5. Cheilocystidia either predominantly subcylindrical to narrowly lageniform with flexuose, obtuse to subcapitate
neck, 2.0–5.0 µm wide, or predominantly utriform to clavate; spores with small germ pore up to 1.0 µm wide.
6. Cheilocystidia subcylindrical to narrowly lageniform with obtuse, often flexuose neck, apex 2.0–5.0 µm wide
1. Ph. arrhenii
6. Cheilocystidia intermixed lageniform, utriform and clavate, the latter with apex 5.0–15.0 µm wide
2. Ph. hadrocystis

Also
By: Christian (Christian Schwarz)
2015-02-20 14:33:10 PST (-0800)

I saw at least two instances of 2-spored basidia for what it’s worth.

Average spore length
By: Christian (Christian Schwarz)
2015-02-20 14:31:01 PST (-0800)

Probably <10 µm.

After measuring handful of 9 or 9.5 µm-long spores, and noting fairly uniform size and shape, I looked around for a big spore. The largest I found was right at 10 µm.

Spore average?
By: Byrain
2015-02-20 14:15:42 PST (-0800)

Need a spore average here, I’m not exactly sure from your notes if you listed it?

1. Spores 9.0–15.0 × 5.0–7.5 µm, on the average longer than 10.0 µm
1. Spores 6.5–10.0 × 4.0–5.5 µm, on the average less than 10.0 µm long

Created: 2015-02-19 21:36:54 PST (-0800)
Last modified: 2015-02-20 14:54:09 PST (-0800)
Viewed: 111 times, last viewed: 2016-11-01 10:07:17 PDT (-0700)
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