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23-04-2026 06:46

François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

22-04-2026 20:17

Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

22-04-2026 19:12

Louis DENY

Bonjour forum.Trouvé à Belfort, est de la France

21-04-2026 21:00

Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

22-04-2026 01:06

Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

21-04-2026 13:36

Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

21-04-2026 13:19

Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

21-04-2026 13:05

Gernot Friebes

Hi,this hyphomycete feels familiar but I was not a

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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