White and hairy on Equisetum - Forum ASCOFrance

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White and hairy on Equisetum

Juuso Äikäs, 08-06-2020 07:01

I found these on a piece of dead Equisetum (fluviatile?) stem close to water. Nearby were some nice Roseodiscus rhodoleucus apos on another, smaller Equisetum species.

The combination of those spores, outer hairs and lanceolate paraphyses seems a bit strange to me. Could this be something like Mollisiopsis or Pyrenopeziza?

Spores:
(14.5) 16.2 - 19.8 (20.8) × (2.6) 2.8 - 3.19 (3.2) µm
Q = (5.1) 5.2 - 6.9 (7.9) ; N = 15
Me = 18.1 × 3 µm ; Qe = 6

Hans-Otto Baral, 08-06-2020 07:23

Re : White and hairy on Equisetum

This should be studied in living state, only the spores are alive on your pics. Perhaps a Psilachnum. There is a P. equisetinum but spores are only 6-8 x 1.5-2 (dead).

Juuso Äikäs, 08-06-2020 08:40

Re : White and hairy on Equisetum

Ok, that genus again... The first two pics are from fresh material in water, others in IKI.

Hans-Otto Baral, 08-06-2020 09:24

Re : White and hairy on Equisetum

Ah, it may be that some of the paraphyses are alive and look multiguttulate.

How long are the hairs? They also might resemble those of Albotricha.

Apothecia of Albotricha are larger than those of Psilachnum. Psilachnum usually has a conspicuous drop in the living asci.

Juuso Äikäs, 08-06-2020 13:52

Re : White and hairy on Equisetum

Here's a few new pics. It's hard to measure the hairs, they seem to be stuck together in messy clumps. But I got something like 100 microns. All the asci have narrow mouths, croziers+.