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12-02-2026 21:34

Attaque des feuilles de Quercus suber
patrice Callard

Bonjour, la face inférieure des feuilles ce certa

11-02-2026 22:15

Rutstroemia maritima?
William Slosse William Slosse

Today, February 11, 2026, we found the following R

12-02-2026 14:55

Brown-spored and multiseptate loculo on Euonymus europaeus - Denmark
Thomas Læssøe

https://svampe.databasen.org/observations/10581810

11-02-2026 19:28

Pezizaceae spec. from Germany
Lothar Krieglsteiner Lothar Krieglsteiner

on small deciduous twig on the ground in forest wi

25-04-2025 17:24

Cosmospora/Dialonectria spec.
Stefan Blaser

Hi everybody, This collection was collected by JÃ

09-02-2026 22:01

Sp
ruiz Jose

Hola, me paso esta colección en madera de pino, t

10-02-2026 17:42

Hélotiale blanche sur Sambucus racemosa
Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,Pourriez-vous me donner

10-02-2026 18:54

Unknown pink heliotale on sphagnum
Erik Van Dijk

Does anyone has an idea what fungus species this m

09-02-2026 20:10

(2 different or one ?) Hypoxylon from the Algarve – on Acacia and Arbutus
Lothar Krieglsteiner Lothar Krieglsteiner

The first 6 tables show surely one species with 2

09-02-2026 14:46

Cistella granulosella of Hyphodiscus incrustatus?
Anna Klos

Goedemiddag, Op donderdag 5 februari vonden we ti

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Pyreno on Aesculus hippocastaneus.
Per Marstad, 23-12-2017 21:00
Per MarstadVery small, ca. 1 mm in diam.
Spores 18-22 x 7.
Looks like Hysterium pulicare, which is very common on oak here.
Norway, Tønsberg.
Per.
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Peter Püwert, 23-12-2017 23:10
Peter Püwert
Re : Pyreno on Aesculus hippocastaneus.
Hi, probably Hysterium angustatum.
Peter.
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Björn Wergen, 23-12-2017 23:40
Björn Wergen
Re : Pyreno on Aesculus hippocastaneus.
Hi Per,

for determination of these "Hysterothecia", spores are the most important feature. There are two common species which mostly grow on bark of various trees: Hysterium angustatum and Hysterium pulicare. The latter one has beautiful bicolorous spores.

Regards,
Björn
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Per Marstad, 27-12-2017 16:53
Per Marstad
Re : Pyreno on Aesculus hippocastaneus.
Is Hysterium angustatum and H. acuminatum syn.?
Per
Stoykov Dimitar, 30-12-2017 12:01
Stoykov Dimitar
Re : Pyreno on Aesculus hippocastaneus.
Hi Per,

I don't know this taxon, Index Fungorum gave the name as legitimate name suggested in Fries as H. acuminatum. You have to check the descriptions provided in the literature.

Dimitar
Alain GARDIENNET, 30-12-2017 14:39
Alain GARDIENNET
Re : Pyreno on Aesculus hippocastaneus.

Hi,


Yes, obviously H. angustatum ; of course ascospores are a good feature but we must be careful because other genus not so far away provide  fungi with such ascospores. For example : Hysteropatella prostii or Mytilinidion tortile.


Synonymies,  by E. Boehm :


Hysterium angustatum Alb. et Schw.
Alb. et Schw. 1805. Consp. Fung. Lusat.: 55.


Syn. :


Hysterium acuminatum Fries, 1823
Hysterium acuminatum var. alpinum Rehm (after Saccardo, 1883, & Rehm, 1896)
Gloniella ambigua Karst., 1891
Hysterium angustatum var. cerotoniae Toll, 1905
Hysterium eucalypti Phill. et Hark., 1884b
Hysterium karstenii Lohman, 1939
Hysterium lentisci Rolland, 1901
Hysterium pulicare var. angustatum Kunze (after Fries, 1823)
Hysterium pulicare var. totarae Sacc., 1908


Best wishes for 2018,


Alain


 

Per Marstad, 30-12-2017 18:06
Per Marstad
Re : Pyreno on Aesculus hippocastaneus.
Thank you to you all.
Per