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05-11-2025 11:33

Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

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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