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16-06-2019 19:17

Nicolas VAN VOOREN Nicolas VAN VOOREN

On dead stem of Veratrum, numerous dot-like specim

16-06-2019 11:54

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.Here is a Hymenoscyphus species growing on b

16-06-2019 12:07

Riet van Oosten Riet van Oosten

Hello, Found by Theo Westra, 13-06-2019 (The Neth

14-06-2019 15:32

Malcolm  Greaves Malcolm Greaves

A small group of Perithecia on rotten (salix?) woo

14-06-2019 09:40

Per Marstad Per Marstad

I have found this in Norway, on hardwood, laying o

14-06-2019 06:40

Django Grootmyers

What is this parasite of Cantharellus minor? Found

11-06-2019 01:49

Valencia Lopez Francisco Javier

Hola amigos...Adjunto fotos de unas supuestas Para

11-06-2019 00:32

Elisabeth Stöckli

Bonsoir, Sur feuilles de ronce (Rubus/roncier à

11-06-2019 16:20

Garcia Susana

Hola, He recolectado este asco sobre estiercol, c

12-06-2019 22:42

Ethan Crenson

Hello all, A friend noticed these tiny fruiting b

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Scutellinia sp. on wood
Ethan Crenson, 10-05-2019 05:54
I am attempting to expand my horizons. I thought I'd try to work on a Scutellinia.

Found growing on a decorticated damp rotting hardwood branch in the Eastern US a few days ago.

Apothecia small: 2-4 mm in diameter, orange-red.

Marginal hairs brown, septate, roots bi- tri- multi-furcate. The ones I measured were 945-1353 x 37-42µm.  The wall of the hairs about 4-5µm thick near the base. Outer apothecial hairs shorter, 358-637 x 25-30µm

Ejected spores with very low ornamentation, barely showing in profile, composed of irregular, occasionally confluent warts. 17-20 x 10-13.5µm.

Paraphyses with orange, filiform with clavate tips which are up to 7µm wide.

If I haven't provided enough information please let me know.

Thank you in advance!

Ethan
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Malcolm Greaves, 10-05-2019 20:43
Malcolm  Greaves
Re : Scutellinia sp. on wood
I would say this is likely to be S olivascens possibly a smaller spores variety given the name var minutospora by B Jannerot
Ethan Crenson, 10-05-2019 21:38
Re : Scutellinia sp. on wood
Malcolm, thank you!  Is there anything that you can see that would exclude S. crinita?  I just used the key in Schumacher, T. 1990. The genus Scutellinia (Pyronemataceae). Opera Botanica. 101:1-107.  I landed on S. crinita.  As something that Seaver knew from North America (as Patella fimetaria) I thought it had some potential.  What do you think?
Ethan Crenson, 10-05-2019 22:51
Re : Scutellinia sp. on wood
On second thought I retract that idea (S. crinita).  It doesn't appear to occur in my range.
Ethan Crenson, 17-05-2019 22:08
Re : Scutellinia sp. on wood
Malcolm (and others as well), I wonder if you could have a look at another collection, a very similar--probably the same--species of Scutellinia as my earlier one. A friend just showed me the online Tom.bio tool which is certainly a time-saver, but it gives rise to a few questions.

The new collection...


Apothecia up to 5mm in diameter
Spores from spore drop (in cotton blue): 18-20 x 12-13 (15) µm.
Q value = 1.46
Spore shape: Ellipsoid
Spore ornamentation: "Small to medium often amoebic warts with some interconnections" Question: Would you agree with that assessment?
Asci: 230-250 x 12.5 (17.5)µm
Marginal hairs: 1114-1243 x 32.5-42.5µm
Marginal hair wall thickness: 5-7.5µm
Marginal hair septations: 4-11
Marginal hairs: some bi- tri- and multi-furcate.
Question: When some roots are simple, some bi/tri-furcate, and one or two multi-furcate, one should opt for multi-furcate, yes?
Marginal hairs: With pointed top. Color brown. Question: would you suggest "Hairs of differing length" or any other options? (Though it doesn't seem to alter the top selection of outcomes.)
Substrate: wood.


The automatic result suggests S. olivascens. But when I scrutinize the "knowledge base" synopsis, the data for S. scutellata seems more apt... especially comparing spore shape and size, hair length and other hair features. Am I missing something? What could be weighing the result toward S. olivascens?


Again, many thanks for your help and comments.

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