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27-03-2024 22:53

Charles Aron Charles Aron

Hi All,Recently I came across these minute, setose

26-03-2024 17:14

Juuso Äikäs

These little black ascos were growing on a dead, d

25-03-2024 13:41

B Shelbourne B Shelbourne

• Hyaloscyphaceae (no VBs), Hyaloscypha: Macro a

25-03-2024 21:27

Riet van Oosten Riet van Oosten

Hello, Found by Laurens van der Linde, March 2024

26-03-2024 14:37

DAVID MARCOS DAVID MARCOS

Spores (telles qu'elles apparaissent à l'intérie

24-03-2024 08:27

Thierry Blondelle Thierry Blondelle

HiOn Hedera helix fallen branchEcological habitat:

26-03-2024 11:06

michel bertrand

Bonjour, Malgré de nombreuses recherches, je n'a

25-03-2024 14:08

Ursula Kozik

Bonjour et bonne journée, On m'a envoyé une tro

25-03-2024 03:56

B Shelbourne B Shelbourne

• Scuttelinia: Macro and habitat.• S. scutella

25-03-2024 20:21

DAVID MARCOS DAVID MARCOS

Bonjour, je m'appelle David et je débute dans l'i

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Stictis species determinations
Danny Newman, 23-12-2013 23:42
Danny NewmanHello AscoFrance,

I wish to apply responsible names to the observations of Stictis over at MushroomObserver.  The ascomycete references consulted in working up this observation:

http://mushroomobserver.org/156118

only contain 2-4 species, whereas Sherwood's research treats dozens.  I have read Hans' laments of the difficulties of this genus on other forum posts.  My impression is that no Stictis species is identifiable without microscopy, and that variables present in preservation and analysis (ie: vital vs. non-vital taxonomy) often make species determinations difficult to impossible even with microscopy.  That being said, I question whether any of the following observations:

http://mushroomobserver.org/observer/observation_search?pattern=stictis

can be confidently identified to species.

As a side note, I'm curious to know if PDF copies of Sherwood's Ostropalean articles in Mycotaxon are available.

Any and all help, as always, is greatly appreciated.

Happy Holidays,

-Danny
John Plischke, 24-12-2013 03:40
John Plischke
Re : Stictis species determinations

Hello Danny,


I will send you the article.  I may have a few microscope photos of the ones I found here in PA, If i can locate them I will put them on mushroom observer.

Hans-Otto Baral, 24-12-2013 09:05
Hans-Otto Baral
Re : Stictis species determinations
Hi all

yes, I am sure that we will not proceed unless we do a detailed study on every collection, including sections of the marginal lobes, detailed evaluation of iodine reaction (Lugol, different colours when iodine enters the hymenium),  living spores with depiction and measurements of individual cells and their contents, ascus croziers, paraphysis apices.

In the case of Stictis (121912), I feel that the cystidia and spores come from the big basidiomycete associated with the Stictis.

Zotto