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17-02-2016 22:49

Ueli Graf Ueli Graf

Hello, I'm looking for  Donadini J.C.  1981 Le g

14-08-2022 18:08

Edvin Johannesen Edvin Johannesen

Found on deciduous wood (probably Betula) in subal

14-08-2022 15:50

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,this Orbilia grew on a strongly rotten branc

13-08-2022 17:18

Stephen Mifsud Stephen Mifsud

I assumed these are weak colonies of Neurospora on

10-08-2022 15:45

Pierre-Yves Julien

Récolte le 31/07/2022 – Ozoir-la-Ferrière (77)

04-07-2022 18:45

Enrique Rubio Enrique Rubio

I can find no suitable answer for this white Bryos

11-08-2022 00:45

Stefan Jakobsson

On a thin deciduous stick (Salix/Alnus/Betula) on

10-08-2022 18:45

François Bartholomeeusen

Good evening all, On 5 August 2022, a friend gave

11-08-2022 08:16

Josep Torres Josep Torres

Hola.Un muy diminuto Pirenomyceto sobre un tronco

10-08-2022 09:11

Josep Torres Josep Torres

Hola.Un Piremomyceto recogido este pasado domingo

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Small spored Pulvinula?
Tyler Bailey, 20-06-2022 18:50
I found this small cup fruiting on charred wood in a firepit that I could use some help with. NE US. Spores seemed small for Pulvinula but it could have been immature I couldn't get many to drop onto a slide.


Apothecia 1-3 mm On burnt wood in a campsite fireplace. Paraphysis hooked, mostly unforked very little keratinoid pigmintation, IKI-, Spores single large guttule: (7.1) 7.5-8.6 (9.2) x (6.8) 7.2-8.6 (*9.4)

Asci 147x10.6

Higher resolution pictures:

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  • message #73071
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Enrique Rubio, 20-06-2022 18:58
Enrique Rubio
Re : Small spored Pulvinula?
Hi Tyler
Please, compare with Pulvinula archeri.
Tyler Bailey, 20-06-2022 19:23
Re : Small spored Pulvinula?
Wow that was fast! thank you.

Using Pfister's monograph that was one had looked most promising, the only thing that didn't match besides the spore size was the paraphyses since so few were branched and there was almost no pigment in them (but widthwise they matched).
Enrique Rubio, 20-06-2022 19:48
Enrique Rubio
Re : Small spored Pulvinula?
I attach some descriptions by Huhtinen and Rifai. As you will see, the variability of some characters seems to be large.
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Tyler Bailey, 21-06-2022 04:12
Re : Small spored Pulvinula?
That answers that pretty thoroughly, thanks for the descriptions as well.
Nicolas VAN VOOREN, 21-06-2022 08:03
Re : Small spored Pulvinula?
I agree with Enrique. P. carbonaria, another carbonicolous species, has larger ascospores.